Battery Battery Size 1/2 AA Battery Chemistry Lithium Voltage - Batteries 3.6V DC Standard Battery Pack Size 2 Capacity - Batteries 1 200 mAh Battery Cross-Reference Saft LS14250 Application Alarms Automatic Meter Reading Automotive Electronics Computer Real-time Clocks Memory Back-up Professional Electronics Security Devices Tollgate Systems Tracking Systems Utility Metering Terminal Type - Batteries Button Diameter 0.57 in Height 0.99 in Max Operating Temp 185 Degrees F