With a 3.7 charge voltage, the APS 5 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. Rechargeable lithium-ion battery 4900 mAh capacity Designed to power Axion / Thermion / Digex models Fits Models: Axion XQ, Axion XQ LRF, Proton FXQ, Proton XQ #html-body [data-pb-style="62DF828CB4D66"]{justify-content: flex-start; display: flex; flex-direction: column; background-position: left top; background-size: cover; background-repeat: no-repeat; background-attachment: scroll; border-style: none; border-width: 1px; border-radius: 0px; margin: 0px 0px 10px; padding: 10px;}#html-body [data-pb-style="62DF828CB4D73"]{border-style: none; border-width: 1px; border-radius: 0px; margin: 0px; padding: 0px;}