RS PRO PR41 Button Battery, 1.4 V, 7.9 mm Diameter, 6 Pack

Zinc-air batteries are non-rechargeable batteries that are completely filled with zinc. They're fitted with a seal that, once removed, generates power as the zinc oxidises in the air. Despite their small size, they hold their voltage for a long time, so they won't need changing very often.

The batteries have a two-year shelf life when stored in dry conditions at room temperature. To get the most out of them, it's advisable to turn off your hearing aid when you're not using it and open the battery holder to let the battery 'breathe'.

• LR series

• Size PR41

• Capacity of 175 mAh

• Diameter of 7.9 mm

• Height of 3.6 mm

• Weight of 0.5 g

• Brown colour

• Operating temperature range of 0˚C to +50˚C

• Impedance of ≤5 Ω (at AC 1 KHz)