... charger and battery backup, using the USB output, through the optional discharge the output line. computer USB charging ... -50 °C Carrying methods: on the travel bag, computer bag, or in the car Power display: LED lights ... both charging and discharging)---can charge PS-4800through computer USB port;C. Output tips: Micro USB ... , PDA, Ipod, Mp4, Ipad. Etc. Mobile battery pack,mini mobile battery pack for