WhichBatteryDoesItUse

Coin cells Button cells AA, AAA, 9V…Key fobs By device Hearing aids

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Battery finder

Type the letters and numbers printed on the old battery. Spaces and dashes do not matter.

Browse all codes: battery codes A–Z.

WhichBatteryDoesItUse is an independent battery reference: sizes, cross-reference codes and what common devices take. Sizes follow IEC 60086; capacities are typical datasheet values and vary by brand.

Keep coin and button cells away from children: a swallowed cell can cause severe internal burns within hours. If you suspect one was swallowed, go to an emergency room immediately.

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