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| Size Code | Color (Tab) | Equivalent Codes | Dimensions (Diameter × Height) | Approx. Capacity | Typical Use / Lifespan |
|---|---|---|---|---|---|
| a10 | Yellow | A10, PR70, PR230H, PR536, DA10, ZA10, AC10, 7005ZD, B010, L10ZA, V10, R10ZA, ME10Z, 10A | 5.8 × 3.6 mm | 80–100 mAh | Very small CIC / IIC aids (3–7 days) |
| a312 | Brown | A312, PR41, PR312, DA312, ZA312, AC312, 7002ZD, B312, P312, R312ZA, 312A | 7.9 × 3.6 mm | 150–180 mAh | Mini BTE / RIC / ITC (3–10 days) |
| a13 | Orange | A13, PR48, PR13, DA13, ZA13, AC13, 7000ZD, B013, P13, R13ZA, L13ZA, 13A | 7.9 × 5.4 mm | 280–310 mAh | Standard BTE / larger ITE (6–14 days) |
| a675 | Blue | A675, PR44, PR675, DA675, ZA675, AC675, 7003ZD, B675, P675, R675ZA, L675ZA, 675A, 675HP (high power) | 11.6 × 5.4 mm | 550–620 mAh | Power BTE / severe loss aids (9–20 days) |
Zinc-air batteries activate upon removing the tab (exposing to air). Match the color tab or size from your hearing aid. Lifespan varies by device power use, streaming, and humidity. These are the standard sizes shown on battery charts like those on gts-shop.co.uk and major manufacturers. Not compatible with regular coin cells due to different chemistry and activation. For best results, buy fresh stock—zinc-air has a shelf life of 2–4 years unopened.
