This small disc-shaped ("coin") battery is used mainly in quartz and electronic watches, as well as in calculators, medical devices and some other electronic devices.
Main technical characteristics
- Capacity 60 mAh
- Voltage 1.55V
- Diameter 11.6 mm, height 3.1 mm
Manufacturers
Maxell
Sony
Toshiba
Brands of analog batteries 390
SR1130SW
390
280-24
SB-AU
V390
D390
Features of element 390
— This is a silver oxide battery, it is reliable and will last longer than an alkaline battery with the same parameters.
— It costs more than alkaline batteries.
— It has high internal resistance and maintains a stable voltage over a long period of time.
— Not intended for short-term peak loads, i.e. for watches with dial illumination or alarm clock.
Batteries should never be recharged. Do not expose them to sudden temperature changes, keep them under a lamp or in the sun, or freeze or defrost them (refrigeration is not suitable). High humidity can also damage them. It's best to store batteries in their original packaging, out of the reach of children.
You can also buy these batteries at retail stores. Ask for them at stores that sell watches.
When purchasing a battery, ensure it meets all specifications: size, voltage, capacity, and internal resistance. Check the manufacturing date and the packaging for integrity.
Don't settle for cheap alternatives. Products from well-known, reputable companies are more expensive, but we pay for quality, reliability, and safety.
