Pulsar&';s APS 2 Battery Pack is designed to power the Thermion Thermal Riflescope for up to 5 hours on a single charge. Battery Used Type: Li-Ion Quantity: 1 Features Rechargeable lithium-ion battery 2000 mAH capacity Designed to power Thermion / Digex and Digex IR Illuminators Specs Battery Type Li-Ion Rated Capacity (MilliAmpere-hour Rating), Ah 2,000 Charging Voltage, V 3.7 Battery charge indication Yes Pin type for battery charger microUSB Body Material Plastic Operating Temperature -4 to 140 / -20 to 60 F / C Length 2.3 / 59 in / mm Width .94 / 24 in / mm Height .94 / 24 in / mm Weight, oz 1.4