inputs.text: gomadic pocket charger convenient versatile works really well - basically 2000mah liion battery thats used recharge liion battery devices builtin solar panel refreshing recharge battery works great conveniently sized scale iphone maybe little smaller pocketable course appears sturdy farchargecarrying capacity little twice average digital camera battery scale common cell smart phone battery bit cases enough juice available pretty useful didnt time appears charge pretty well direct sunlightrefresh onboard battery recharging methods include 1 solar charging 2 5volt mini usb input port use car charger computer usb port usb wall charger allows use electrical source chargeup pack take meoutput charging devices usb output port use common usb plug cord connect digital camera phone ipod course use apples asanine proprietary plugcord etchas switch side select either 5volt 57volt charging output fastcharge device necessaryhas indicator light tell recharging operation also bright ledbank flashlight builtin back sidedoesnt come much way instructions mostly common sense use itit would nice specs included example much time takes solar panel recharge pack direct sunlight electrical current output solar panel direct sunlight etcthere several types devices available one appears particularly well made