longest lasting hearing aid batteries
Rayovac World's Longest Lasting Mercury-Free Hearing Aid Batteries Size 312. 1  1.45V. 2  Do not swallow, dispose in fire, recharge or allow contact with metal objects or other batteries - may leak or rupture. 3  1.45V.  Do not swallow, dispose in fire, recharge or allow contact with metal objects or other batteries - may leak or rupture.