inputs.text: fantastic external backup battery - recently purchased imax powerpack imp500 cannnot express enough completely satisfied compact sized power pack use charge apple iphone works flawlessly love iphone eats battery power especially connected 3g network little gehem chargeuse iphone anywhere anytime need soon traveling across country product provide comfort knowing battery power loss not issue price product think reasonable especially consider multi use product used chargeuse devices example wifes kindle also say customer service product second none extrehemely knowledgeable helpful friendly im certain anyone purchases product extrehemely satisfied