I know the issue is pretty well documented. I've had a look round the Internet and found a number of suggestions for fixing the problem of battery draining fast on the iPhone 4s, but so far there's been no improvement. I've turned off most of the high power functions like location services, push notifications, Siri and auto brightness. In the time it took to write the above, it dropped 4% and the back of the phone is getting quite warm.
Does this sound like a good case to take it back to Telecom and get it repaired? Or is it likely to be some other function I've overlooked?