... portable charger for Iphone/HTC/Ipod mibile charger for Iphone4 Power Tube emergency charger for Iphone4/Ipad2 /Ipod,,emergency charger ... phone, digital camera, PDA, MP3, MP4, etc.Power source1 X AA BatteryCompatibilityIt can be used on all popular mobile phones ... nteruptions.Typical Efficienc88%-93%NET Weight20g PACKAGE INCLUDED:1 x Power Tube 22004x charging cable ,can choose 4 differet connecctors ...