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Size 312 hearing aid battery (brown)
Size 312: 1.45 V zinc-air hearing aid battery, 7.9 mm × 3.6 mm, about 180 mAh (261 mWh). Same battery: PR41, A312, 312A, ZA312.
1.45 Vvoltage
7.9 mmdiameter, 0.311 in
3.6 mmthick, 0.142 in
≈ 180 mAhcapacity
Size 312: what to know
- Size 312 is the most common hearing aid battery, used by most receiver-in-canal aids.
Size 312 equivalents
PR41A312312AZA312
Can I use another battery instead of a Size 312?
| Battery | Size | Volts | Works? | Why |
|---|---|---|---|---|
| LR726 | 7.9 mm × 2.6 mm | 1.5 V | No | Hearing aids need zinc-air cells. |
| SR726SW | 7.9 mm × 2.6 mm | 1.55 V | No | Hearing aids need zinc-air cells. |
| SR731SW | 7.9 mm × 3.1 mm | 1.55 V | No | Hearing aids need zinc-air cells. |
| LR41 | 7.9 mm × 3.6 mm | 1.5 V | No | Hearing aids need zinc-air cells. |
| SR41 | 7.9 mm × 3.6 mm | 1.55 V | No | Hearing aids need zinc-air cells. |
What uses a Size 312 battery?
- Receiver-in-canal and in-the-canal hearing aids (the most common size)
Guides: hearing aid
Tab colour brown. Pull the tab only when needed and wait a minute before closing the door. About 5–10 days of daily wear.