Removablesolarpanel Backuppowersourceinthecomputerbackpack. Compatibleformobilephone,MP3,MP4,IPOD,PDA,PSPandotherentertainmentdevice. YoucanuseLi-ionbatteries,hydrogenbatteries,drybatteriesoranyAAbatteriesto chargeryourphone DifferentMobilePhoneadaptorsavailable PassedCE,ROHS,FCC,PSE,SONCertification.SpecificationsExternalDimension:47X36X15cmMatetial:840DNylonSolarInput:360mA,6VOutput:400mA,6VBattery:3.7V750mARechargeableLi-ionbatterySolarPanelType:MonocrystallinesiliconSolarPanelSize:155X56mmSolarPanelPowerRating:2WattGuarantee:1Year PartListSolarCharger:1pcsSolarPanel:2pcsLi-ionBatteries:3 pcsOptionalCellphoneadaptor:5pcs