Highfields Amateur Radio Club
Glossary Appendix.
copyright date

Battery Details.

Same physical size as the LR41 button cell (1.5 Volt).

NiMH rechargeable batteries of this size are available but may not be suitable for all hearing aids.

Equivalents:

312, 312A, 312AE, 312AP, 312HP, 312HPX, 312P, 312PA, 312SA, 312UP, 312ZA, 7002ZD, AC312, AC312E, AC312E/EZ, AC312EZ, AC-312E, AP312, B312BA, B3124, B347PA, Brown, CP41, DA312, DA312H, DA312H/N, DA312N, DA312X, E312E, H312AE, L312ZA, ME7Z, P312, PR41, PR312, PR312H, PR312PA, PR-312PA, PZ312, PZA312, R312ZA, RS312, S312A, V312A, V312AT, VT312, W312ZA, XL312, ZA312.

Image
not to scale.
Common
Name.
Dimensions.
Diameter × Thickness.
Chemical Composition. Nominal Voltage.
battery Hearing Aid Brown 7.9 mm × 3.6 mm

Contacts:
Case Positive.
Slightly raised area Negative.

NiMH

Zinc - Air.

1.2 v.

1.35 v
(130 mAh).

Button & Coin Equivalents page.
Consumer Equivalents page.