hearing aid batteries a312

A312 batteries are zinc‑air hearing‑aid batteries (size 312).

Listings show a nominal voltage of about 1.4–1.45 V and a specified capacity of 72 mAh where noted.

Open the retail pack carefully (many instructions suggest using scissors while seated), remove the protective tab, and let the battery 'breathe' for about one minute before inserting it.

Listings indicate these batteries can remain fresh for up to four years in storage.

Descriptions mention long, wide tabs and brown-colored tabs that make the batteries easier to grip and handle.

Product listings label these batteries as "Single‑Use," indicating they are not rechargeable.

Listed weights are approximately 0.53–0.54 grams per battery.

Product descriptions state the batteries provide consistent, reliable sound quality throughout their life and are designed to resist leaks and avoid premature low‑battery signals.