Miniature power elements used in Axion and Thermion models provide sufficient operation time and can be quickly replaced. B-Pack mini batteries can be quickly charged either with a Pulsar APS battery charger station (sold separately) or in the thermal unit connected to USB.
Bought this battery along with the American Defense mount for my Thermion XQ35. The people at Outdoor Legacy Gear are top notch as far as knowledge and customer service.