Brown Size 312 hearing aid batteries come four to a card, and ship in quantities of 10 cards in a box.
Battery size: 312 (7.9 X 3.6 mm).
Lifespan: up to 5 days (does not include streaming; for frequent streaming, estimate lifespan at 2.5 days.)
All zinc-air batteries from Beltone are mercury free. They are activated by oxygen and are factory-sealed with a sticker that must be removed before using in your hearing aids. Be sure to store at room temperature in a dry environment.
Beltone part number B347PA
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