Stealth Cams FieldMAX External Lithium Rechargeable Battery easily attaches to any trail camera with a 12-volt external battery jack, ensuring the set remains operational for extended stretches. Simply set the trail cam, attach the included power cable via the integrated locking thread, and forget it. Even in extreme weather, this rechargeable 5,000 mAh lithium-ion battery with an included USB charging cable virtually eliminates the need for repeated, wasteful use of disposable AA batteries.