Non-Rechargeable vs. Rechargeable Hearing Aid Batteries: Size 10, 312, 13, 675 Hearing Aid Batteries
Hearing Aid Batteries 312 | 312 batteries | Microbattery
Audeo Marvel M90 - Any Difference between the 312 and 13 version other than battery size and telecoil? - Hearing Aids - Hearing Aid Forum - Active Hearing Loss Community