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Defective usb plug or charger. Try with a usb cable just for checking , so you'll know the answerit shows that charger is connected but doesnot gains charge but sometimes it does
it shows that charger is connected but doesnot gains charge but sometimes it does
http://forums.windowscentral.com/members/chintan-gohel.htm i charge with data cable as my charger is damage , does that really affects