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What battery does a hearing aid use?
Most hearing aids take a size 312 (1.45 V zinc-air hearing aid battery). Some use Size 13, Size 10 or Size 675 instead. The size is on the hearing aid packaging and in its manual, or match the tab colour on your old battery packet.
| Battery | How common | Size | Volts | Capacity |
|---|---|---|---|---|
| Size 312 | Most common | 7.9 mm × 3.6 mm | 1.45 V | ≈ 180 mAh |
| Size 13 | Also used | 7.9 mm × 5.4 mm | 1.45 V | ≈ 310 mAh |
| Size 10 | Also used | 5.8 mm × 3.6 mm | 1.45 V | ≈ 90 mAh |
| Size 675 | Also used | 11.6 mm × 5.4 mm | 1.45 V | ≈ 620 mAh |
Hearing Aid battery: what to know
- Hearing aid batteries are colour-coded on the packet and the sticker tab: 10 yellow, 312 brown, 13 orange, 675 blue.
- Zinc-air cells start working when the sticker tab is pulled off; waiting about a minute before inserting lets them reach full voltage.
- Many newer hearing aids are rechargeable and take no disposable batteries.
How to check which battery your hearing aid takes
The size is on the hearing aid packaging and in its manual, or match the tab colour on your old battery packet. Battery codes are printed on the flat face of coin and button cells and along the side of AA, AAA and 9V batteries. Match the code exactly: a cell that looks similar can be a different thickness or voltage; see the Size 312 page for safe swaps.