Have the same problem in a water damaged iPhone 4S here at the mo battery drain went from 87% to 64 in 45 minutes and phone was not being used was only in lock mode..
Charged battery to 87% again and used battery in another 4s an in 1 hour battery dropped to 79% and that was being used a few minutes on Facebook.
Have taken out camera now and testing again will update on progress
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== Update ==
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hi all just an up date have tryed everything with this 4s and still really bad battery drain even disconnected every connector on the motherboard and still no help.
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i let the phone run out of battery to see would it charge up and it wont it just shows the apple logo for 3 seconds and repeats. tryed battery in another phone and it charged up fine... in all water damage has won this time
Have the same problem in a water damaged iPhone 4S here at the mo battery drain went from 87% to 64 in 45 minutes and phone was not being used was only in lock mode..
Charged battery to 87% again and used battery in another 4s an in 1 hour battery dropped to 79% and that was being used a few minutes on Facebook.
Have taken out camera now and testing again will update on progress