Battery 9V Everyday Capacity - Batteries 650 mAh Standard Battery Series Fusion Battery Chemistry Alkaline Voltage - Batteries 9V DC Standard Battery Pack Size 2 Max Operating Temp 130 Degrees F Min Operating Temp -20 Degrees F Shelf Life 5 yr Standards ANSI 1604A IEC-6LR61 Height 4.5 in Overall Height 4.5 in Width 3.8 in Package Quantity 2