... 6V~12V Features:1.External lithium battery pack for PSP,iPod, MP3,MP4,Mobile and other devices ... 40oC( Recommend -5~35oC) Full charged one time for 45 days9.Cycle life :more than 500 times10.Accessories :AC ... 24*82(mm)13.Battery weight :180gFunctions :Compatible for PSP,iPod, MP3,MP4,Mobile and other devices ... and stability of the item ,such as protectin for over-charge ,over-discharge and over-heat.It ...