Product listings show size 312 batteries at 1.45 V and 1.4 V, and some entries list a capacity of 72 mAh.

Descriptions advise removing the tab and letting the battery 'breathe' for about one minute before use. Unopened size 312 batteries are said to hold power for up to four years in storage.

Listings specify A312 zinc-air chemistry and indicate these batteries are single-use (non-rechargeable).

Pack sizes range from 6 to 24 batteries. Descriptions highlight long or wide tabs (often colored brown) designed to make the batteries easier to grab and handle.

Product descriptions state unopened size 312 batteries can hold power for up to four years in storage.

Listings show weights of 0.53 g and 0.54 g, i.e., a range of 0.53–0.54 grams.