Highfields Amateur Radio Club
Glossary Appendix.
copyright date

Battery Details.

Physically the same dimension as the LR44 and shares the "675" and "44" numbers. A possible replacement for the MR44 in devices that are not air tight.

The Cochlear Implant "675" battery is a high power version of the standard "675" battery and, just to confuse matters, not only are they the same physical size and voltage but the manufacturers colour code both types blue! You can use an implant battery in a behind the ear aid, it will last longer but implant users will find a much shorter than expected battery life if they use the lower power ones, also reported is a loss of quality.

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


675, 675A, 675AE, 675AP, 675CA, 675CP, 675HP, 675HPX, 657SA, 675UP, 675 Implant Plus, 675P (HP), 675PA, 675SA, 675SP, 7003ZD, A675, A675P, AC675, AC675E, AC675E/EZ, AC675EZ, AC-675E, AP675, B675PA, B6754, B900PA, Blue, C675, DA675, DA675H, DA675H/N, DA675N, DA675X, H675AE, L675ZA, ME9Z, P675, P675i+, PR44, PR44P, PR675, PR675H, PR675P, PR675PA, PR-675PA, PZ675, PZA675, R675ZA, RS675, S675A, V675, V675AT, V675A, VT675, W675ZA, XL675, Z675PX, ZA675, ZA675HP.

not to scale.
Diameter × Thickness.
Chemical Composition. Nominal Voltage.
battery Cochlear Implant Blue

Hearing Aid Blue
11.6 mm × 5.4 mm

Case Positive.
Slightly raised area Negative.


Zinc - Air.

1.2 v.

1.35 v
(600 mAh).

Button & Coin Equivalents page.
Consumer Equivalents page.