312 batteries

Size 312 batteries are used in hearing aids and are typically sold and labeled for that purpose.

Product listings specify size 312 batteries at about 1.4–1.45 volts (listed as 1.4 V and 1.45 V across available details).

Size 312 batteries use zinc‑air chemistry (listed as A312) and are single‑use, non‑rechargeable cells.

Common package quantities for size 312 batteries range from 6 up to 24, with 6‑, 12‑, and 24‑count packs frequently offered.

Some listings show a typical capacity of about 72 mAh and a weight around 0.53–0.54 grams for size 312 cells.

Product details list a shelf life of up to four years for size 312 batteries.

Listings highlight handling features such as long, colored, or wide pull tabs on size 312 cells that make them easier to grip during insertion and removal.

One product description advises: open the child‑resistant pack (for example, with scissors), remove the battery, peel off the tab, wait about one minute to allow the cell to activate, then place the battery in the hearing aid.