Button Cell Battery Battery Size 309/393 Battery Chemistry Silver Oxide Voltage - Batteries 1.5V DC Standard Battery Pack Size 1 Capacity - Batteries 75 mAh Battery Cross-Reference 309 309/393 393/309 AG5 D309 SR754W V309 Drain Type - Battery High Drain Diameter 0.311 in Depth 0.213 in Standards ANSI Color Code No Code