How to change the battery in a Chinese wristwatch. Replacing the battery on the computer motherboard
Yana Volkova July 29, 2018A modern person rarely has to worry about the problem of replacing a battery in a wristwatch. Usually they are changed at points of sale quickly and free of charge. But sellers are different. It happens that behind the counter you are greeted by a charming young lady who may understand the sizes and manufacturers of batteries, but has no idea how to design a wrist accessory. This problem is also familiar to those who go on long hikes or whose work involves constant exposure to nature. A watch is irreplaceable, and a spare battery should always be in your pocket.
Variety of batteries for watches
Pocket and wrist watches – the time of quartz devices
Mechanical watches – prestige and status. And often also the memory of those beloved relatives to whom they belonged. Modern quartz watches are certainly an elegant accessory, but also a necessity to constantly be in the flow of time and monitor it. Winding a mechanical watch is a beautiful procedure, a kind of ritual. Replacing the battery in a wristwatch is an important routine. Let's find out what is needed for this.
What will you need to open and remove the cover? Determining the type of protection
So, let’s say that you have a bloody nose and need to insert the battery into your watch yourself - the mechanism is standing, the time-measuring device will soon come in handy, there is a spare battery. In a good watch, the battery and mechanism are reliably protected by a cover that can be attached in at least three ways:
- screwed on with screws;
- closed with a screw mechanism;
- closed with a slamming mechanism.
These methods determine how to correctly and accurately remove the cover of a wrist or pocket watch without damaging your valuable device and precious nerves.
Pocket and wristwatch cover – reliable protection
Method No. 1. How to open a watch with a snap cover using your fingernail?
Changing the battery in a quartz wristwatch with this type of cover is not difficult. Look carefully at the back of your accessory and feel for something like a notch or indentation. Then pick up this place with your fingernail and pull the watch cover towards you. The threat of ruining your manicure undoubtedly exists.
If you have small scissors, a knife or something similar that is flat and hard on hand, use it
And leave damage to your nails to a completely hopeless situation. Be careful if the back of your watch just won't open, no matter how hard you try. Stop damaging property. You may be dealing with a screw cap.
Method No. 2. How to unscrew a screw-down back cover with a rubber ball?
Ideally, you should have a caliper handy for this type of cap. It's better to use it like this:
- Spread the tool along the width of the marks and tighten the bolt firmly.
- Insert the caliper into the two recesses and smoothly begin to unscrew the cover to the left.
But a caliper is not always an accessible tool. It’s still somehow easier to find a rubber ball. To do this, firmly press the watch cover without a recess with a rubber ball (little by little!) to ensure its reliable adhesion to the surface.
Keep the watch in one place and rotate the ball counterclockwise without lifting it from the lid. As the ball turns, the defense must also move. If everything works out, then carefully unscrew the cap all the way with your fingertips.
- Open the scissors.
- Install their tips into two opposite grooves in the cover.
- Secure with a little force and begin turning the scissors counterclockwise.
- Has the lid given way? Unscrew it all the way with your fingers.
And please be very, very careful with scissors! Do not accidentally injure yourself or others.
Vernier calipers are a safe tool for opening the watch cover.
Method No. 3. How to unscrew a tight back cover or a cover with screws?
You can open the watch to change the battery with your fingernail only if a couple of conditions are met:
- The nail is quite strong and long.
- The screws are not tightened too tightly.
But for a more successful result, it is more convenient to use scissors, a knife or a screwdriver of the appropriate size. Simply place one tip of the tool into the groove on the head of one of the screws. Be sure to press the end of the tool firmly into the grooves and do not lose your grip as you turn them. Unscrew all the screws one by one and carefully place them in one place. They are small and instantly lost.
Changing the battery
Hooray! The cover is off! The battery is in front of us. What's next? And then, to successfully change the battery in a quartz wristwatch without damaging it, use tweezers or small tweezers. Use them to remove the old battery, but first remember its correct location in the watch. Confusing a plus with a minus is a questionable procedure for a fragile device.
If the size and shape of the new battery completely matches the old one, also carefully insert it into place in the watch using pliers or tweezers, observing the polarity
Check the clock operation. Are they coming? Wonderful! No? Check again the contact of the battery in the mechanism and, if possible, its expiration date. If everything is ok, but the clock still does not work, then contact a specialist. The risk of the watch breaking is high.
Carefully replacing the battery with tweezers
Put the cover in place
In any case, you should still close the back cover of the watch after replacing or removing the battery. If you find something to unscrew the protection with, use the same thing to screw it back. Only with a rubber ball, do everything in the reverse order - first, carefully screw it in with your fingers, and then press the ball and screw it all the way. Don't overdo it! Simply press the slamming lid firmly with the right side, most often until it clicks lightly.
These are some simple tricks for replacing batteries. Don’t forget to set the hands on the dial to the correct time and get ready to answer the simple question “What time is it?” for another couple of years. Can you tell me?" And this watch will help you with this:
Women's watch with crystals on a ceramic bracelet, OKAMI(price on the link)
Classic mechanics for lazy amateur watchmakers
The accuracy of quartz and electronic watches depends not only on the internal structure of the mechanisms, on the manufacturer, but also on the correct choice of battery( batteries)for them. When purchasing a battery, a consultant in a store will be able to select the right size based on the markings indicated on the existing element. However, the battery life will not always last long. Knowing some of the nuances outlined in the article, you can purchase a reliable battery that will last for several years, taking care of the accuracy of the watch and the punctuality of its owner.
Which batteries are better?
You can determine when the moment to change the battery is by the daily time lag, or by the “End of life” function, in which the second hand jumps through several divisions at once, indicating the low capacity of the battery.
Before going to the store, you should familiarize yourself with battery classification which are:
— saline. Marked with the letter R. The positive side is their low cost compared to other types of batteries and their versatility, as they are suitable for any wristwatch. However, they have a short shelf life and service life; in the absence of proper attention on the part of the owner, the electrolyte can leak from a discharged battery, leading to breakdown of the mechanism;
— alkaline(alkaline, manganese-zinc). They are marked LR, are in the middle price category, and depending on the manufacturer and the current consumption of the electronic circuit of the watch, will last at least a year. The shelf life is 2 – 3 years, which should be taken into account when purchasing;
—silver-zinc
(S.R.). They are produced in three types, divided by load mode, and are high in cost. Option SR-LD - has a low, uniform current, which is optimal for simple mechanisms (that is, the presence of hour, minute, second hands). Will last at least 2 years. Option SR - HD - contains a high, uneven current, ensures the operation of complex mechanisms for 2 - 3 years. SR – MD is considered the most reliable; it will maintain the accuracy of the watch mechanism for 3 years;
—lithium(CR) batteries, suitable for all types of mechanisms, have a voltage of 3 V and a shelf life of 3 to 7 years. Accordingly, they are the most expensive, but the best among the listed batteries.
Firms
Among battery manufacturers, Japanese ones have the longest service life and storage compared to their European and Chinese counterparts. This Sony, Seiko, Seizaiken(in principle the same Seiko, but... not quite)
Good companies can also be considered Maxell(Japan), Energizer(USA), . Regarding the German Varta and Swiss Renata. Varta is basically like China. Renata has a catch - it can leak while the clock is still running.
How to change a watch battery
The battery is replaced on a light, clean surface, placing a soft cloth under the watch to prevent scratches on the glass; in a hat to prevent hair or skin particles from getting inside the watch. Clean the recesses in the watch case from dirt (for example, using a toothbrush soaked in water and soaped with laundry soap).
How to open the lid?
Open the watch cover, taking into account its fastening mechanism, which can be as follows:
- on screws. In this case, reduce the load on the screws arranged in pairs, and then unscrew them in any sequence;
—snap-on, you need to find a narrow crack in the area where the strap is attached, carefully pry the lid off with a knife blade, and open it, trying not to force it.
On waterproof watches, the lid is secured with a thread. Craftsmen use a special tool to unscrew it; at home, a caliper with tucked jaws or tweezers will do. It is advisable to place the watch case in a vice.
Remove the sealing gasket. Having reached the battery, loosen the screw securing the movable clamping bar and move it to the side. The battery is lifted under the action of a spring mechanism. Afterwards, it is removed from the housing using tweezers with insulated claws, the contact is checked for cleanliness (if necessary, cleaned with a cloth soaked in alcohol) and a new battery is inserted.
Is it possible to change the battery in a wristwatch yourself?
If you have a budget watch with a simple mechanism for opening (closing) the lid, you can completely cope with replacing the battery yourself. It is enough to choose the right battery and carry out the work, following the recommendations described above.
It is better to entrust the replacement of batteries in expensive or waterproof watches to professionals, as they will correctly install the sealing gasket using silicone grease (depending on the type of gasket), which will prevent the mechanisms from getting moisture inside.
Based on the article, the consumer will be able to choose the optimal type of battery for a wristwatch and, if desired, replace it at home.
The most tiring thing in life is waiting and catching up. In order to have to wait less and catch up less often, the Babylonians invented a sundial as early as 3500 BC. The first mechanical watch was allegedly invented by Pope Sylvester II in 966, and the first mechanical wristwatch appeared in 1775 thanks to the Swiss Abraham Louis Breguet. Modern quartz wrist and wall clocks only appeared in 1937 thanks to the efforts of Lewis Essen of the Royal Observatory of Greenwich.
Currently, the proportion of mechanical wristwatches in use that use an electronic circuit instead of a pendulum is more than 90%. In appearance, mechanical and quartz wristwatches are no different, but if you look inside, the difference will be obvious.
The photograph shows the movement of a fully mechanical watch with the back open. On the right, similar to a ship's wheel, there is a pendulum, which ensures the accuracy of the clock.
In quartz watches, the speed of movement of the second, minute and hour hands is ensured, as in mechanical watches, by gears, and instead of a pendulum, a quartz oscillator is installed. The spring is replaced by an electric battery.
Electrical circuit and operating principle of a quartz watch
Quartz watches, regardless of manufacturer and size, owe their accuracy to a quartz resonator, which ensures stable operation of the oscillator at a frequency of 32768 Hz, made on a microcircuit. The microcircuit in appearance is a semiconductor crystal with wires extending from it. To protect the crystal from external influences, it is filled with a compound, so in a watch the microcircuit looks like a flattened drop of dark plastic.
The electrical circuit of a quartz watch from any manufacturer, be it Casio, Tissot, QQ, Geneva, Swatch or any other, looks the same. The power supply from the battery is supplied through a switch mechanically connected to the watch's crown, which watchmakers call a crown. When the crown is pulled away from the watch case, the switch contacts open and power supply is not supplied to the microcircuit. The clock stops. The vast majority of quartz watches have a DC battery with a supply voltage of 1.5 V. But sometimes there are models designed for a supply voltage of 3.0 V.
In the microcircuit, the frequency of the crystal oscillator is divided to a frequency of 1 Hz (1 Hz = one oscillation per second), and these pulses are applied to the electromagnet coil of the microstepper motor with sequentially changing polarity. Two permanent magnets of different polarities are mounted in the rotor of the stepper motor. When the rotor magnets interact with the magnetic field of the electromagnet changing to the opposite one, the rotor rotates 180° with each change. A trib rotor is also installed on the rotor shaft, which is a gear that transmits torque to the gears of the watch mechanism.
The presented electrical circuit of a quartz clock is used in all types of quartz clocks - wrist, wall and even wall with a pendulum - and differs only in the use of batteries of different capacities and stepper motor power.
When should you change your watch battery?
Over time, even watches with a fresh battery from well-known brands begin to lag and soon stop, which indicates the need to change the battery. Some models have the “END OF LIFE” function, thanks to which, if the remaining battery capacity is low, the second hand begins to move not one division of the dial, but jumps over several at once, thereby informing the owner of the watch that it is time to change the battery. The battery life depends on its capacity and the current consumption of the watch's electronic circuit and ranges from one to five years.
Preparing the workplace for repairs
If you decide to replace the battery in your watch yourself, then before you begin, you should prepare your work area. In addition to the electronic unit, the mechanism of a quartz watch contains gears with microscopic teeth, and even a tiny foreign particle, such as a speck of dust, hair, dandruff or dirt, getting between the teeth can lead to their partial or complete loss of performance. If the table surface is hard, then after successfully replacing the battery, scratches may appear on the watch case.
Therefore, the table must first be wiped from dust with a damp cloth and then covered with a white sheet of paper or a lint-free cloth of sufficient size. The white color is convenient because if a screw or other small part is accidentally dropped, it will be easy to find. It is advisable to wear a hat, such as a baseball cap, or tie a scarf around your hair.
I would think twice before handing over an expensive watch for battery replacement to a watchmaker sitting in an unkempt booth with a full head of hair.
Preparing the watch for battery replacement
The battery, depending on its capacity and watch model, usually lasts from a year to several years. During this time, a lot of dirt accumulates in the recesses of the watch case and the voids of the bracelet. The leather strap also gets dirty on the inside. To prevent dirt from getting into the mechanism when replacing the battery, and for hygienic reasons, it is necessary to clean the watch and bracelet, and it is better to replace the strap, since it is almost impossible to completely remove dirt from its pores.
The bracelet or strap is secured to the watch using two thin metal tubular bars (clips). The bar is a thin-walled tube into which a spring is inserted and two pins movably fixed on one or both sides.
If you press the pin along the axis, it will sink into the tube, and if you release it, it will come out again. The length of the tube is slightly less than the distance between the ears, and the ears have blind holes. Thus, if the pins are recessed and then inserted into the holes of the lugs, the straps are securely fixed in the watch case.
In the section of the bracelet, which is attached to the bar on the reverse side, there is a recess specifically designed to allow the bar pin to be recessed when removing the bracelet. In some straps, the pin can be recessed only on one side, so when installing the bracelet, you need to orient the strap in such a way that there is access to the movable pin. Otherwise, it will be very difficult to remove the bracelet from the watch in the future.
In order to remove the bracelet, you need to grab the protrusion on the pin with a sharp object, for example, a knife or an awl, and press it into the bar tube, then it will easily separate. The bracelet is installed in the reverse order: one pin of the bar is inserted into the hole of one ear, and the second pin (after drowning) is inserted into the opposite hole of the ear. After fixing the bracelet, you must make sure that both pins fit into the holes of the lugs. To do this, just pull the bracelet a couple of times.
When installing the bracelet, make sure to orient it correctly, with the bracelet latch facing the six o'clock side of the dial.
How to clean your watch and bracelet from dirt
The watch can be easily cleaned of dirt using a toothbrush moistened with soapy water from laundry soap. The best way to completely remove dirt from a bracelet is to place it in the dishwasher. You can wash the strap in the washing machine, but to do this you need to put it either in a pocket with a zipper, or in a special bag for washing small items, or in a sock or stocking, tying them in a knot.
How to open a watch cover
To replace the battery, you need to remove the cover, which is located on the side where the watch touches your hand. Depending on the watch model, the cover is attached in one of four ways. On screws, due to the tight fit of the cover in the watch case or on a thread cut directly on the cover itself, or using a locking ring with an external thread that presses it to the body.
How to remove a cover that is secured with screws
To remove the cover from the watch, which is secured with screws, just unscrew all the screws. First, using a small screwdriver with a suitable slotted blade (a screwdriver from a watch repair screwdriver set is best), you need to loosen the diametrically opposed screws in pairs, just like when changing wheels on a car. And then unscrew the screws in any order.
When replacing the cover, all screws should be tightened until they stop and then tightened crosswise with a little force.
How to remove the snap cover
Before opening a watch with a lid shown in the photograph, which is held in place by frictional forces, you must carefully examine the place where its edge comes into contact with the watch case.
Usually, in the area of the lugs for attaching a bracelet or strap, there is a barely noticeable gap formed by a protrusion on the cover or a recess in the case.
To remove the cover, you need to insert a thin knife blade into this slot and, pressing it against the body and acting like a lever, lift the cover. It is unacceptable to press hard with a knife, since if it breaks when opening the lid, you can damage the mechanism. When opening a watch with a snap-on cover, usually no questions arise; difficulties often arise when replacing the cover in its original place.
How to remove a screw-on cover
In expensive and waterproof watches, as a rule, the cover is attached using a thread cut into the edge of the cover or a retaining ring.
In the photo you see a watch whose lid is attached using a thread cut on its edge.
And in this photo the lid is pressed with a retaining ring with an external thread. Threaded methods allow you to tightly press the lid through the sealing gasket to the body, and thereby reliably protect their mechanism from dust and moisture.
In addition, such a cover is easier to remove and install, especially if there is a special key, for example, as in this photo. By rotating the knurled nut, the distance between the key pins can be changed to unscrew caps and locking rings of different diameters.
How to unscrew the lid using improvised means
Not every home craftsman has a special key on hand for unscrewing the covers, and if the clock stopped working due to a dead battery, then ordering and waiting for the key to arrive is not always acceptable. And spending money if you can get by with improvised means is irrational.
The most common tool used by home craftsmen is a caliper with tucked jaws. It is enough to spread the jaws to the width of the grooves in the cover, fix this position with a screw, and the caliper is ready for use. The ends of its jaws are inserted into the grooves of the lid, and with pressure they turn it counterclockwise. The main thing is to move the lid from its place, and then it will easily turn away.
If you don’t have a caliper, you can use any tweezers, using an emery column to shape the legs to match the profile of the grooves on the cover. If it is difficult to turn the tweezers with your hand, you can insert a screwdriver between the tweezer legs at the surface of the lid and unscrew the lid using a lever-like method.
It will also be easier and more convenient to unscrew the lid with tweezers if you shape the ends of its legs, as in the photo. The width of the tweezer legs can be fixed by placing between them, for example, a piece of plywood of the required thickness and securing it with electrical tape or tape. This modification will not damage the tweezers, and you can continue to use them for their intended purpose.
It is much easier to unscrew the cover from the watch if it is fixed. You can secure the watch in a vice by holding it by the ears. To prevent scratches, it is necessary to cover the jaws of the vice with leather or other soft material. You don’t need to clamp it too hard, as long as the watch holds, otherwise you can deform the lugs.
Above is a video demonstrating how to unscrew the cover from a quartz wristwatch using tweezers.
Replacing the battery in a quartz wristwatch
After removing the cover, you can begin replacing the battery. This is not a difficult job, but requires compliance with certain rules. But before you remove the battery, you need to remove the sealing gasket and remember how it stood, so that you can also install it back during reassembly. This note is important if the gasket has a trapezoidal rather than a round cross-section.
As can be seen from the photo, the battery is secured in the mechanism using two clamping bars: one fixed on the right, and movable on the left side.
To prevent the battery from falling out of the socket, the movable bar is fixed with a screw. Therefore, before moving the bar to the side, you need to use a clockwise screwdriver to loosen the screw by unscrewing it half a turn counterclockwise.
As soon as the bar releases the battery, it will rise upward in the socket under the pressure of the spring contact for supplying negative voltage.
You need to remove a dead battery, as well as install a new one, using tweezers. If the tweezers are metal, then to prevent short-circuiting of the battery terminals, you must put insulating tubes on the tweezers’ legs or cover them with electrical tape. If you don’t have tweezers, you can use your fingers, after washing your hands well with soap.
After removing the battery from the socket, it is necessary to inspect the petal of the negative contact, located in the center of the bottom of the socket, to ensure that it is clean and touches the clock mechanism. In this watch, the contact was covered with plaque. I had to clean it with a cloth soaked in alcohol.
Checking and selecting a button battery
The voltage at the terminals of the button battery removed from the watch, measured with a multimeter, was about 1 V at a standard of 1.55 V. The battery had clearly become unusable.
Before installing a new battery, it is advisable to check what voltage it produces. If the battery has been lying in an unheated warehouse for more than one year since its release, it may well become unusable due to self-discharge. There are no devices that allow you to determine the capacity of a button battery. Using a voltmeter you can only determine the suitability of a battery for running a watch, and how long it will work can only be determined when the watch stops.
The battery type is always marked on the battery body, which is also its positive terminal. Due to the fact that there is no international standard for labeling button batteries, each manufacturer uses its own labeling. As a result, batteries of the same size and with the same technical characteristics have a dozen names.
For example, the 364A button alkaline (alkaline) battery with a capacity of 20 mAh, shown in the photo, installed in this watch, can be successfully replaced with any button from the following series: SR60, SR621SW, GP364, V364, D364, RW320, LR60 and many others , suitable in diameter and thickness. When going to the store to buy a battery, just write down the type installed in the watch being repaired and the seller, if the required type is not available, will select an analogue for you. It is advisable to save a record of the battery type so that you don’t have to open the watch again in the future.
How to choose a battery
When choosing a button watch battery, many experience difficulties due to the lack of systematic information on the technical characteristics of different types of batteries. The table will help you easily select the type of button battery according to the designation on its case.
| Table of technical characteristics of button and coin batteries for watches | |||||||
|---|---|---|---|---|---|---|---|
| Element type (battery) | IEC designation | Load mode (load current) | Watch mechanism | Voltage, V | Shelf life, years | Price | |
| Saline | R | universal | any | 1,5 | 1,5-2 | low | |
| Alkaline (alkaline, manganese-zinc) | LR | 2-3 | average | ||||
| Silver-zinc (oxide-silver) | S.R. | LD | low uniform | simple | 1,55 | 2-3 | high |
| HD | high uneven | any | |||||
| M.D. | universal | ||||||
| Lithium | CR | any | 3,0 | 3-7 | |||
R salt battery cheap, suitable for any type of watch, has a short shelf life and does not last long, especially if it has been in storage for more than a year, since its self-discharge current per year is at least 10% of its capacity. In addition, a discharged battery is prone to leakage of electrolyte, which in a forgotten watch can lead to damage to the mechanism. I do not recommend installing this type of battery in a watch, unless in a desperate situation.
Alkaline - alkaline LR battery is the best choice in terms of price and quality. A fresh battery will last, depending on the complexity of the watch mechanism, for at least one and a half years.
Silver-zinc battery from a number of expensive ones and has all the advantages listed above, in addition it has a very low self-discharge current. To optimize cost, these batteries are available in three versions. The cheapest is the SR-LD, which is ideal for watches with a simple movement, that is, watches that only have hour, minute and second hands. A watch with such a fresh battery will last at least two years. The SR-HD battery is perfect for watches with complex movements, and the SR-MD is universal and can successfully replace SR-LD and SR-HD, but it is the most expensive. If funds allow, then this is the best choice for both watches with a simple mechanism and a complex one.
Lithium batteries for watches is available only in the form of flat disks of different sizes and therefore there is no choice. The battery is expensive, has all the advantages of alkaline and silver-zinc batteries, but lasts for at least three years. I happened to change a lithium battery in a watch that had served for nine years.
Interchangeability of button batteries
Although there are recommendations from the International Electrotechnical Commission (IEC) on the rules for labeling button batteries, many manufacturers prefer their own standards. Therefore, batteries of the same size and technical characteristics have more than a dozen names. The interchangeability table for button batteries given below will help you figure out which battery best suits your needs.
It is worth noting that the list of button batteries given in the table is intended not only for use in watches, but also in any other devices, for example, in cameras and video cameras to save settings and the current time when charging batteries, in calculators, LED flashlights, children's toys , laser pointers and many other electronic devices.
| Table of interchangeability of button and flat batteries for watches | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| IEC | Renana, GP, Varta (V), Duracell (D), Energizer | Maxeel, Sony, National, Panasonic, Toshiba | Seiko | Rayovac | IEC | Camelion, Golden power, FTY REF | Capacity, A.h | Dimensions ∅×h, mm | Clock mechanism type |
| SR43 | 301 | SR43SW | SB-A8 | RW34 | LR43 | G12 | 120 | 11.6×4.2 | LD |
| SR44 | 303 | SR44SW | SB-A9 | LR44 | 175 | 11.6×5.4 | LD | ||
| SR48 | 309 | SR754SW | RW38 | LR48 | G5 | 80 | 7.9×5.4 | LD | |
| SR67 | 315 | SR716SW | SB-AT | RW316 | 19 | 7.9×1.6 | LD | ||
| SR62 | 317 | SR516SW | SB-AR | RW326 | 10 | 8.8×1.6 | LD | ||
| SR64 | 319 | SR527SW | SBAE/DE | RW328 | 21 | 5.8×2.6 | LD | ||
| SR65 | 321 | SR616SW | SBAF/DF | RW321 | 14 | 6.8×1.6 | LD | ||
| 329 | SR731SW | RW300 | 37 | 7.9×3.1 | LD | ||||
| 335 | SR512SW | SB-AB | 5 | 5.8×1.2 | LD | ||||
| 337 | SR416SW | 8 | 4.8×1.6 | LD | |||||
| 339 | SR614SW | 11 | 6.8×1.4 | LD | |||||
| 341 | SR714SW | 15 | 7.9×1.4 | LD | |||||
| SR43 | 344 | SR1136SW | RW36 | LR42 | 105 | 11.6×3.6 | LD | ||
| 346 | SR712SW | SB-DH | 10 | 7.9×1.2 | LD | ||||
| 350 | LR42 | 105 | 11.6×3.6 | HD | |||||
| SR44 | 357 | SR44W | SB-B9 | RW42 | LR44 | G13 | 190 | 11.6×5.4 | HD |
| SR58 | 361 | SR721W | LR58 | G11 | 21 | 7.9×2.1 | HD | ||
| SR58 | 362 | SR721SW | SB-AK/DK | RW310 | LR58 | G11 | 23 | 7.9×2.1 | LD |
| SR60 | 364 | SR621SW | SBAG-DG | RW320 | LR60 | G1 | 20 | 6.8×2.1 | LD |
| 365 | SR1116W | 40 | 11.6×1.6 | HD | |||||
| 366 | SR1116SW | RW318 | LR45 | 40 | 11.6×1.6 | LD | |||
| SR69 | 370 | SR920W | SB-BN | G6 | 38 | 9.5×2.1 | HD | ||
| SR69 | 371 | SR920SW | SB-AN | RW315 | G6 | 28 | 9.5×2.1 | LD | |
| SR68 | 373 | SR916SW | SBAJ-DJ | RW317 | 29 | 9.5×1.6 | LD | ||
| 376 | SR626W | 27 | 6.8×2.6 | HD | |||||
| SR66 | 377 | SR626SW | SB-AW | RW329 | G4 | 28 | 6.8×2.6 | LD | |
| SR63 | 379 | SR521SW | SBAC-DC | RW327 | G0 | 15 | 5.8×2.1 | LD | |
| 380 | SR936W | 82 | 9.5×3.6 | HD | |||||
| SR55 | 381 | SR1120SW | SBAS-DS | RW30 | LR55 | G8 | 50 | 11.6×2.1 | LD |
| SR41 | 384 | SR41SW | SBA1-D1 | RW37 | LR41 | G3 | 45 | 7.9×3.6 | LD |
| SR43 | 386 | SR43W | SB-B8 | LR43 | G12 | 130 | 11.6×4.2 | HD | |
| SR54 | 389 | SR1130W | SB-BU | LR54 | G10 | 80 | 11.6×3.1 | HD | |
| SR54 | 390 | SR1130SW | SB-AU | RW39 | LR54 | G10 | 80 | 11.6×3.1 | LD |
| SR55 | 391 | SR1120W | SB-BS/ES | LR55 | G8 | 50 | 11.6×2.1 | HD | |
| SR41 | 392 | SR41W | SB-B1 | RW47 | LR41 | G3 | 45 | 7.9×3.6 | HD |
| SR48 | 393 | SR754W | SB-B3 | LR48 | G5 | 80 | 7.9×5.41 | HD | |
| SR45 | 394 | SR936SW | SB-A4 | RW33 | LR45 | 84 | 9.5×3.6 | LD | |
| SR57 | 395 | SR927SW | SBAP-DP | RW313 | LR57 | G7 | 55 | 5.9×2.6 | LD |
| SR59 | 396 | SR726W | SB-BL | LR59 | G2 | 32 | 7.9×2.6 | HD | |
| SR59 | 397 | SR726SW | SB-AL | RW311 | LR59 | G2 | 32 | 7.9×2.6 | LD |
| SR57 | 399 | SR927W | SB-BP/EP | LR57 | G7 | 55 | 5.9×2.6 | HD | |
| Battery load mode: | HL - low uniform | HD - high uneven | |||||||
Let's look at an example of how to use table data. For example, after removing the cover from the watch, you saw that it contains an SR726SW battery. Now it is enough to find its designation in the table and any battery in the horizontal row in which the SR726SW is located will be suitable for replacement, namely: SR59, 397, SB-AL, RW311, LR59 and G2. Despite the different markings, these are all the same batteries and their main parameter of interchangeability is their geometric size. But since the battery was in a watch with a simple mechanism, the range of batteries suitable for replacement expands significantly. Any battery from the series with number 396 is perfect for replacement, since its overall dimensions are the same, and this type of battery can operate for hours, both with a simple HL and a complex HD mode of current consumption.
Nowadays, many people order button batteries online directly from Chinese manufacturers. To save money, the Chinese often make the blister simpler, using adhesive tape instead of molded transparent plastic. When removing the battery from the blister, a sticky layer may remain on its surface. For reliable contact, before installing the battery in the watch, it is necessary to remove this layer from its surface with a rag soaked in acetone or alcohol.
How to properly close the watch cover
After replacing the battery, an equally important step begins - replacing the cover.
Watch water permeability
The tightness of the watch depends on the correct installation of the cover. On the dial of the watch you can find markings indicating the degree of its water resistance in conventional meters. So in Swiss watches, the number after the letters WR indicates the pressure in atmospheres that the watch can withstand. For example WR30, WR50 or WR100. But if you immerse a watch in water in practice, it will get inside the watch, regardless of the markings. This is more of a publicity stunt and nothing more. Watches with this marking only withstand splashes of water. So, when swimming in the sea or visiting a sauna, it is still better to take the watch off. Only watches specially produced for divers, marked WR300 or more, can safely dive into the water.
However, if you install the gasket incorrectly when installing the cover, you can deprive the watch of protection even from splashing water. There is nothing complicated here; before installing the sealing gasket, you need to lubricate it with silicone grease, which is sold in aerosol packaging. If the watch has a wedge-shaped gasket, install it as it was installed previously. Lubrication is not necessary, but it will prevent the gasket from moving out of place when closing the lid and will make it easier to unscrew it in the future.
To lubricate the sealing gasket, you need to place it on a sheet of paper and from a distance of 10-15 cm, spray it with a cloud of silicone from a spray can for 0.5 seconds.
It would seem impractical to purchase a whole can of silicone lubricant, but such lubricant will not go to waste in the household. Silicone grease is neutral and does not destroy materials, including rubber and plastic. It retains its properties in the temperature range from −40 to +250°C. Silicone grease can be used to lubricate everything where it is necessary to reduce friction and protect against oxidation and water. If the key of an English lock is difficult to enter and rotate, then if you spray silicone into the hole from a can, the lock will work perfectly. In winter, after lubrication, door seals will not freeze, rubbing plastic parts will not creak, and the locks in your car will not freeze. Silicone is also useful for lubricating the ceramic plates of the mixer cartridge, seals and latches of plastic windows. If it is unacceptable to spray silicone, you can first moisten the cloth by placing it close to the sprayer, and then lubricate the desired surface. Silicone grease comes in only one type and is sold in hardware and automotive parts stores (the same, but twice as expensive) in cans and bottles of 50 ml or more.
Methods for snapping resistant lids
When installing the lid, you must remember that the groove on the inside of the collar must be located exactly above the axis of the crown, otherwise the lid will not slam shut.
Sometimes difficulties arise when closing the snap lid due to insufficient finger force. In this case, if the glass is flat, you need to place the watch glass on a stack of newspapers and, standing, snap the lid, pressing it simultaneously with two thumbs.
In the case of convex glass, it is necessary to cut a hole in the diameter of the glass in a piece of plywood slightly thicker than the convex glass or select a plastic screw cap of a suitable diameter and put a watch in it, as in the photo.
If your fingers are not strong enough, you can use a vice. To do this, you need to squeeze the watch with the jaws of a vice through two gaskets in the form of covers until a characteristic click appears. The mineral water screw on the side of the watch cover can be replaced with a gasket equal in size to the cover made of a non-solid material: plywood, thick cardboard or leather. The vice can be successfully replaced with a clamp, which is often used for screwing table lamps to the table top.
If you don’t have enough finger strength to install the watch cover, and you don’t have a vice or clamp at hand, then you can slam the watch cover in an extraordinary way. To do this, you need to place the watch in a protective glass or plastic cover on the floor. Then, slowly stepping from foot to foot, press the lid through the gasket described above with the clean heel of the shoe you are wearing until a click appears. Since the force is applied only to the metal watch case, it is difficult to damage the mechanism and glass even if desired. To avoid pressure on the crown due to possible deformation of the lid, part of the plastic in it opposite the crown must be removed.
I used the described methods for installing stubborn watch covers in practice. You can see for yourself how effective they are by practicing on abandoned old clocks; there are some like them in every home.
As you can see, changing the battery in a watch is not at all difficult, and after reading the article, any home craftsman, even those who have taken on such work for the first time, can cope with this task.
Nowadays, wristwatches most often act as a stylish accessory. But for those who are accustomed to navigate time using them, it is already difficult to leave the house without fastening the bracelet of their wristwatch. Most devices are equipped with a battery that gradually loses its charge. It needs to be changed periodically.
Replacing a watch battery
Mechanical watches only require regular winding. Electronic devices are more convenient in this regard. With a new battery they work correctly for quite a long time. When the wristwatch starts to lag, this is the main signal that the charge is fading.
The battery is not difficult to find and is inexpensive, so many people decide to replace the element themselves. Before tampering with the mechanism of your wristwatch, you should familiarize yourself with some recommendations:
- Check to see if the product warranty has expired. If not, then even to replace the battery you must contact an authorized workshop. Once the integrity of the product is compromised by an unauthorized person, the warranty becomes void. If they break down, you will have to spend a lot of money on repairs.
- Make sure that the device begins to work incorrectly or stops due to a dead battery. Other reasons related to the operation of the electronic mechanism may lead to malfunction. If, according to calculations, it is too early to change the battery, then it is better to immediately contact a qualified technician. Some quartz watch models are equipped with an END OF LIFE indication system. If the accessory has the abbreviation EOL on the back cover, the second hand will jump through four positions when the battery is dead.
- Try to replace the battery before the watch stops completely. Otherwise, the battery will leak and ruin the entire mechanism.
Battery selection
The new battery should perfectly match the size of the previous one. If it turns out to be less, the contact will constantly move away, which will lead to malfunctions. If it is more, then the case cover may not close, and the mechanism and dial may be deformed.
Therefore, there is no need to immediately throw away your used battery. You can come to the store with it, and the seller will help you choose exactly the same one.
The battery must be of high quality. Ideally, it should last between two and five years depending on the container, but the danger is not that it will fade quickly. Zinc and salts interact inside the element, and if the body is deformed or corroded, a low-quality product may leak. Most often, this leads to the need to completely replace the mechanism.
The latest generation of electronic watches from manufacturers RENATA and MAXELL have a special case design that prevents leakage.
The batteries must match not only in size, but also in charge capacity. It is indicated on the body. But you should remember that the same battery capacity will not give any guarantee that the new battery will last as long as the previous one. If it lay in a warehouse for a long time, then the battery could very well discharge itself. Unfortunately, there is no way to know how long she has left to work.
The voltmeter will show the suitability of the battery, even if it has only a short time left to work.
On the side of the battery that corresponds to the “plus” there is a marking with the type of nutrient element:
- Saline. Suitable for any watch model, inexpensive, but does not last long. When purchasing such a battery, you should pay special attention to the date of manufacture, since it can self-discharge by 10% in a year. The most significant disadvantage of this battery is that it is prone to leakage. Masters do not recommend using it for expensive watches.
- Alkaline. The optimal combination of price and quality. It is inexpensive and lasts up to one and a half years. But not as dangerous as salt water.
- Silver-zinc. One of the most expensive batteries. It has all the necessary advantages: it does not leak, works for a long time, and self-discharges slightly. The SR-MD type battery is the most versatile of them. Suitable for any watch mechanism.
- Lithium. The battery is also expensive, but will last at least three years. There are known cases when such a battery was discharged only after seven years of excellent operation.
Tool
The workflow does not cause any hassle if you have special tools. But not every home has a set of clock screwdrivers. Then improvised means will come to the rescue. For example, a knife or blade is useful to remove the cover.
Also, at your nearest optical store you can choose a set of screwdrivers for repairing glasses, which are also suitable for working with watches.
It will be much easier to unscrew the back wall if you remove the strap from the watch and hold the case in a vice.
The clamp should not be too strong so as not to damage the ears. Place a piece of soft cloth between the clock and the vice.
When replacing the battery yourself, never use metal tweezers. Such a tool short-circuits the poles, which leads to loss of element capacity and significantly deteriorates the quality of its operation. The tweezers must be plastic or have an insulated working part.
Replacement method
Before disassembling the device, it is necessary to prepare the working environment. The clock mechanism consists of the smallest parts. The ingress of even an unnoticeable particle (dust, hair, dandruff, crumbs) can lead to damage to the device.
Therefore, the table must first be wiped with a damp cloth and then thoroughly wiped dry.
The surface of the table should not be too hard, otherwise after replacing the battery the accessory will be scratched. Cover the table with white paper or a tablecloth. This way you can protect the jewelry from scratches, and on a light surface it’s easy to find small parts that have fallen out.
Based on this, you can pay attention to the conditions under which specialists work in repair shops. You can hardly trust an expensive accessory to an untidy person who works at a dirty table.
How to open the lid?
Once you are convinced that it is necessary to replace the battery, a new battery has been correctly selected and your work area has been prepared, you can begin to work. The most difficult thing is to open the lid without causing damage to the accessory and without injuring yourself.
The back of the housing can be screwed or pressed.
If there are indentations on the cover around its circumference, it can be unscrewed. The easiest way to do this is to use a caliper. Spread it across the width of two opposite recesses and fix the tool. Gently turn it counterclockwise several times. However, not everyone has such a device at home, much less a special key. Then you can try to unscrew the lid using tweezers, the ends of which are bent in the form of paws.
You can give them this shape yourself.
Also, the back wall of the clock can be screwed on with separate screws. A special watch screwdriver is suitable for working with such a device. First of all, you need to unscrew the diametrically opposite screws, and then remove the rest in any order.
If the back panel is smooth, then it is pressed. Take a close look - there should be a slight indentation on the lid. Pry off the lid with a small knife or thin screwdriver. Movements should be firm, but neat. Hold the watch tightly so as not to break it.
Insert the battery
After the cover is removed, you should study and remember how the battery is attached. Most often it is clamped between two slats, one of which is movable. It is secured with a screw. To rotate the bar, this screw must first be unscrewed a little. After this, the bar can be easily unscrewed using a sharp object. As soon as the battery is not clamped by the bar, it will jump due to the springy “minus” contact.
After this, using plastic tweezers, you need to carefully remove the old battery and insert the new one in the same way. It is important not to confuse “plus” and “minus”.
Such batteries can also be found in watches and radio equipment. This battery is used to store settings in CMOS memory when the computer is unplugged. If it were not for this battery, then every time the power was turned off, all BIOS settings would be reset to the standard value.
This battery is just a battery, not an accumulator. It does not charge while the computer is running. Therefore, sooner or later it will run out.
As a rule, this battery works without problems from 3 to 6 years. After this period, you may need to replace the battery on the motherboard. Now we will tell you how to replace the battery on the motherboard if it suddenly runs out.
Step No. 1. Completely disconnect power from the system unit.
Before disassembling the computer, it must be completely disconnected from the power supply. Simply turning off the power is not enough; you must physically disconnect all cables from the system unit.
Step No. 2. Open the side cover.
After you have turned off the power, you can begin disassembling the system unit. In order to replace the battery you will need to remove the side cover of the system unit. In most cases, this is enough to gain access to the battery. In rare cases, you may need to disable your video card or .
Step No. 3. Remove the faulty battery from the motherboard.
After removing the side cover, you can begin replacing the battery on the motherboard. Removing the old battery is quite simple. To do this, you need to press the latch, which is located on the side of the battery.
It is better to buy a new battery for installation on your motherboard in advance. These batteries are designated CR 2032 and are produced by various manufacturers.
You can buy a new battery at a computer or radio hardware store. This battery only costs a couple of dollars. If you are afraid of getting confused and buying the wrong battery, you can first remove the battery from the motherboard and go shopping with it in search of a new one.
A new battery is installed in exactly the same way as it was removed.
Step No. 4. Close the lid and turn on the computer.
After installing a new battery into the motherboard, you can close the side cover of the system unit and connect the computer. If after this the BIOS settings are saved even after turning off the power, then the new battery is working normally.
