... : Aluminum alloy + plasticfunction: portable power supplycolor: blueapplication:Suitable for mobile phones,MP3&MP4 players.PDA, MID, digital cameras,Handheld game consoles,PSP ... digital products, it will firstly use the power from the portable power supply.5. Controled by chip, protect the circuit intelligently ... -20°C~50°C storage temperature-20°C~50°C Portable power supply