Button Cell Battery Battery Size 377 Battery Chemistry Silver Oxide Voltage - Batteries 1.5V DC Standard Battery Pack Size 1 Capacity - Batteries 27 mAh Battery Cross-Reference 280-39 376 377 AG4 BA D377 MA SB-AW SP377 SR626SW SR626W SR66 V377 Drain Type - Battery Low Drain Diameter 0.264 in Depth 0.098 in Max Operating Temp 140 Degrees F Min Operating Temp -40 Degrees F Standards ANSI/IEC Color Code No Code