The Go Puck 3X is a pocket-sized charger that stores enough power to charge any mobile device. With the 3X charger, you can charge small phones (e.g. iPhone 4s) about three times. Dual USB output offers standard and rapid charging at up to 2 amps. Go Puck charger is super lightweight with a rugged design that resists shock and vibrations. 4 LED state-of-charge indicator. Includes active mount and 40" USB micro-USB active cable. 4400 mAh capacity. Weighs 6.4 oz. 3" x 3" x 0.8".