Powering zinc-air batteries are top of the line, setting the industry standard in hearing aid batteries. They are specifically designed to give the reliability which results in an extremely long life with maximum comfort. These batteries are 100% experienced , thus every cell is experienced for its electrical and mechanical characteristics in compliance with its specification. Power one hearing aid battery products . Power one brand model 312 hearing aid batteries, 1. 45v, 1-dial card, 6 pcs. (6 X 2 Pack, 12 Pieces)