Power Fort is a portable battery charger that provides a instant power anytime, anywhere. Power Fort can charge almost every electronic device with USB port, such as mobile phones, portable gaming device and mp3 player. It is a boost of power wherever you may be. Also, the special bypass circuit design prevents the battery from the damage resulted from the charging-discharging process and thus ensures a longer lifetime compared to similar products on the market. (AC plug or laptop USB port) Furthermore, Power Fort features built-in battery life LED, flashlight, short circuit, over-charge, discharge proteciton, over temperature protection which you can charge the battery up to 500 times and still remains at 85 percent battery capacity. In addition, the Power Fort comes with travel bags, USB cables and interchangeable plugs to recharge in different locations. It is easily portable and perfect for anyone on the go.