I have a galaxy s relay 4g
It took 2 hours of constant usage, to kill the battery from 50 to 0%
Figuring this was normal, I was configuring everytthing while downloading 50apps over wifi
Note phone was on airplane mode, but wifi was on.
Next day I updated from stock ics to stock jb
Turned it on, it was at 91% and after 5 min of usage the phone said it was too hot to charge the bat.
Phone went from 91% charge down to dead with one hour of moderate usage and 2 hour siting idle on airplane mode, wifi on..
It was 46c on batt temp whole time
Charged for 3 hours from pc usb and it gained 3%.
Charged another 3 on wall socket that came with nokia lumia, rated at 1400mA.
The battery info showed that even though the phone was off, it woke up many times during the night -- IT WAS OFF as in the battery with the 4 white circles on the bottom were showing!
Turned off, removed sdcard, factory reset (left sd out, its still out) i
Came back ok, it syned to google and reinstalled all my apps, then died again
I've tried 2 batteries, and 3 different chargers,
I factory reset the phone too.
Wake lock says the android system used 18% of the battery... other than that I can't see anything obviously wrong