Miniature power elements used in Axion XM, Axion XQ, Digex and Thermion models provide sufficient operation time and can be quickly replaced. B-Pack mini batteries can be quickly charged either with included charger station or in the unit connected to USB.This is the same battery that ships with the Axion XQ monoculars. This battery does NOT fit any other Pulsar product. Grants up to 6 hours operating time.