The brunton metal 4400 charger will provide you with that backup energy you need wherever you are whatever yoursquore doing the charger features dual usb 20 and micro usb output ports to connect most small electronic devices using their usb charging cables with outputs of 21 and 1amp the power station is perfect for charging up your tablets smart phones mp3 players cameras or other small electronic devices on the go you can charge the internal battery with an integrated usb cable tha