Whether you are traveling for work or play, this is the most efficient way to keep your gadgets from running on empty. Fuel up with this compact-sized, 2200mAh premium grade lithium ion battery power bank and get the energy that you need to keep going. Recharge your devices quickly with the premium 2200 mAh lithium ion battery. Premium 2200mAh lithium-ion battery. Built-in short circuit and surge protection. Includes charging cord and keychain. Product Size: 3 13/16" W x 29/32" L x 13/16" H.