Button Cell

Button cells are used to power minor convenient electronics devices such as wrist watches, mini calculators, synthetic cardiac pacers, implantable cardiac defibrillators, and hearing aids. Battery Type is Li-Mno2, Li-Ion, Zn/Mno2.Nominal Capacity (mah) includes 550, 220, 1050, and so on. Weight (g) can be 0.78, 1.8, 3.2 and much more. Size (mm) can be 24*5, 20*3.2, 24.5*5, and so on. The application includes wrist watches, pocket calculators.

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Detailed Description for Button Cell


             Devices using button cells are usually designed to use a cell giving a long service life, typically well over a year in continuous use in a wristwatch. Most button cells have low self-discharge and hold their charge for a long time if not used. Higher-power devices such as hearing aids, where high capacity is important and low self-discharge less so as the cell will usually be used up before it has time to discharge, may use zinc-air cells which have much higher capacity for a given size, but discharge over a few weeks even if not used.

             Button cells are single cells, usually disposable primary cells. Common anode materials are zinc or lithium. Common cathode materials are manganese dioxide, silver oxide, carbon monofluoride, cupric oxide or oxygen from the air. Mercuric oxide button cells were formerly common, but are no longer available due to the toxicity and environmental hazard of mercury.


Common applications:

* Electric wristwatches, both digital and analogue

* Calculators

* Hearing aids

* Some remote controls, especially for keyless entry

* Backup power for personal computer real time clocks and BIOS configuration data

* Small PDA devices

* Various electronic toys (like tamagotchi, Pokémon Pikachu or a Pokéwalker and other various digital pet devices)

* Laser pointers

* Small LED flashlights

* Battery-operated children's books

* Glucometers

* Security tokens

* Cyclocomputers

* Red dot sights and electronic spotting scopes

* Manual cameras with light meters

* LED throwies

* Various video game cartridges or memory cards where battery-powered RAM is used to store data

* PCMCIA static RAM memory cards

* Solar/electric candles

* LED Bicycle head or tail lighting

* Digital thermometers


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