Zinc air batteries

There are currently 4 battery sizes available for hearing aids. Sizes from smallest to largest: 10, 312, 13 and 675.

Hearing battery types vary slightly in size, so to make buying batteries for your hearing aids easier, manufacturers color-code each battery size:

• Type #10 - 5.8mm diameter x 3.6mm high
• Type #312 is 7.9mm diameter x 3.6mm high.
• Type #13 is 7.9mm diameter x 5.4mm high.
• Type #675 is 11.6mm diameter 5.4mm high.