The ATN Extended life Battery Pack USB Cable Cap Butt Stock Case gives you plenty of juice whenever and wherever you need it. Up to 22 hrs of continuous use. It is easy to recharge and can power other devices. The kit includes a 20,000 mAh battery pack, USB to Micro USB with L Shape Connector, water resistant rubber seal, and an adjustable butt pouch. The pouch attaches to buttstock, shields from heat of battery, and has extra room to store shells and other essentials. Also features convenient cartridge loops on the outside. The ATN Extended life Battery Pack USB Cable Cap Butt Stock Case is designed for the X-Sight and Thor series rifle scopes. Designed for X-Sight Series and Thor Series 20,000 mAh battery 22 hours battery life Water Resistant Rubber Seal Adjustable Buttstock Pouch Battery Indicator Saves money and time because you stop buying and changing batteries