Amazon.com: Toshiba Hearing Aid Batteries Size 312, PR41, (60 Batteries) : Health & Household
60 Pcs Rayovac Extra Zinc Air Hearing Aid Batteries A312 312a Za312 312 Pr41 S312 Pr41 Hearing Aid Battery A312 For Hearing Aids - Ear Care - AliExpress
Zinc-Air Battery PR41 | 1.4 V DC | 184 mAh | 8-Blister | Hearing Aid | Silver