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