I have a galaxy s3. I am a heavy data user of this phone and charge it several times a day as it is always being used. When I am charging the phone and it is on and in use, the battery is draining. I am using the stock charger, which is the usb cord and the little rectangle box it plugs into which is then plugged into an outlet. I turned the phone off and let it charge and then powered it back on after 30 mins. This helped for the rest of last night. Now this morning it is doing the same thing. I have read on other forums that the cord for the charger is the problem after awhile. I need some help and answers quickly so if it is the battery I can order a new one. I need my phone as I live in a rural area and is my only way to call anyone or for help.