Description With a 3.6 charge voltage, the APS 3 battery pack holds a battery life of up to 4 hours in Axions and 6-8 hours in Thermions. The battery pack is designed to fit the Axion Thermal Monocular and Thermion Thermal Riflescope.  Battery Used Type: Li-Ion Quantity: 1 Product Downloads Product Specifications Features Rechargeable lithium-ion battery 3200 mAh capacity Designed to power Axion / Thermion / Digex models Fits Axion Models: Axion XM22 Key, Axion XM30 Key & Axion XM30S 4 hours in Axions 6-8 in Thermions Specifications Battery Type Li-Ion Rated Capacity (MilliAmpere-hour Rating), mAh 3,200 Charging Voltage, V 3.6 Battery charge indication Yes Pin type for battery charger microUSB Body Material Plastic Operating Temperature -4 to 140 / -20 to 60 F / C Length 2.9 / 74 in / mm Width .94 / 24 in / mm Height .94 / 24 in / mm Weight 2.1 oz