Hearing Aid Battery Battery Size 312 Battery Chemistry Zinc Air Voltage - Batteries 1.4V DC Standard Battery Pack Size 16 Capacity - Batteries 185 mAh Battery Cross-Reference 312A 312AE 312HP AC312E B3124 B347PA DA312H4 ME7Z R312ZA S312A Drain Type - Battery High Drain Diameter 0.314 in Depth 0.135 in Max Operating Temp 122 Degrees F Min Operating Temp 14 Degrees F Color Code Brown Package Quantity 16