This compact, rough and tumble backup battery pack provides extreme power in extreme conditions. With a rechargeable 5600mAh lithium-ion battery, you can count on the Boost X for a big time boost of power - anytime, anywhere. Features: 5600 mAh rechargeable lithium battery, dual USB charging ports (2.1A output), water resistance: IP65, LED flashlight, silicone exterior, Micro-USB charge input cable included. Dimensions: 3.9" X 2.1" X 1.1". Wt: 6.4 oz.