A galvanic power source in the form of a tablet or coin is most often used to power an electronic watch. Due to the high degree of capacity, low self-discharge coefficient, the battery lasts for several years effectively.
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SR920SW Battery Specifications
The SR920SW battery belongs to the class of miniature batteries. She is silver-zinc. Such elements in comparison with manganese-zinc have a high voltage, low internal resistance.
In addition, the voltage remains stable until the end of the work, it does not drop, as is the case with alkaline batteries. SR920SW are intended for devices with uniform power consumption.
As for the main characteristics, they are:
- diameter - 9.5 mm;
- thickness - 2.1 millimeters;
- weight - about 1.4 grams (for various manufacturers, the weight varies by a few tenths of this value).
The battery capacity is 33 mAh. Voltage 1.55 Volts. The power source is demanding on temperature. When going beyond the allowed boundaries, it begins to discharge quickly.
| Parameter | Value |
|---|---|
| Basic designation | SR920SW |
| View | Silver-zinc element |
| Capacity | 33 mAh |
| Voltage | 1.55 V |
| Analogs SR920SW | 371, 370, AG6, SR920W, LR921, SB-AN, RW315 |
| GOST | SC-0.03, SC-59 |
| IEC code | SR69 |
| The form | Tablet coin |
| Height | 2.1 mm |
| Diameter | 9.5 mm |
| Weight | ~ 1.4 gr |
Battery Analogs SR920SW
There are not many analogues in this battery.
In size fit:
However, these batteries have other specifications. It is possible to select the optimum coin only if you take into account the features of the equipment where it will be installed.
Battery Applications
In most cases, the SR920SW battery is used as a power source for watch movements. At the same time, it is suitable not only for old models of watches, but also for modern ones with increased energy consumption.
The SR920SW battery has the best characteristics among its counterparts in size, so it is used not only in watch movements.
It is used in calculators, alarm key chains for cars, miniature children's toys, lighters, laser pointers. The SR920SW is also used as a power source in various devices, including medical ones.
Can the SR920SW be charged
You cannot charge the battery marked SR920SW, because it is not a battery. A miniature power device has a minimal degree of self-discharge.
With constant use, it will be discharged no earlier than a few years. Taking into account the small price of a disk battery, it can be said that the inability to charge is not a problem.
Popular manufacturers and their features
Optimum in terms of energy intensity, durability and cost are models of manufacturers Maxell and Renata. If you need a battery of a certain company of this size, then you can choose an identical analogue among the other two companies.
Good options provide firms:
- Sony
- Varta;
- Robiton
- Duracell
- Ansmann;
- Seizaiken;
- Panasonic
What to look for when purchasing
Batteries of almost all manufacturers are high-quality, energy-intensive, they last quite a long time, and at the same time they have a minimum cost (from 20 rubles). Which one is better is a matter of technical features.
You should carefully study the following parameters:
- Rated voltage;
- power and voltage;
- capacity;
- self-discharge level.
It is worth paying attention to the temperature range for operation. Typically, batteries of this type do not work well at temperatures above 30 degrees.
If you are going to install it in equipment that tends to overheat, then it is better not to do this and choose another option that can withstand temperatures above.
Particular attention should not be paid to the country of manufacture. Reviews about this group of products on YouTube and comments by ordinary consumers who bought the type of battery in question indicate that high-quality disk options are available from both foreign and Chinese and Russian companies.
Still have questions about Battery SR920SW or have something to add? Then write to us about it in the comments, this will make the material more complete and accurate.
