Your battery life looks great. I would speculate you are in an area where yourphone is not constantly looking for 3g or WiFi ? Last night at home, I had my WiFi turned OFF, and woke up to a poor battery (10%). When I leave WiFi ON, it does WAAAY better. At my home, 3G is also very poor - so turning WiFi off forced it to grab email through a marginally available 3G - I'm confident this is my battery killer, but will prove it to myself tonight for round 2 of some testing. I usually have my email on Push, but I thought I'd set to Fetch to see how it helps.
My conclusions are pointing towards turning ON wifi if able to use, turn it OFF if not available, so that phone is't searching. If in a bad 3G area, I think it works too hard trying to connect 3G. Is there an APP out there that can accurately and safely report detailed usage ? Like time spent attempting to find 3G, WiFi, etc. ? I really think this is the issue.
So here's my plan for tonights trial, at my home where I have WiFi, but poor 3G.
- WiFi on (and connected WiFi through home WiFi)
- 3G on
- Exchange mail set to FETCH instead of Push (does anyone find this makes much difference on battery ?)
- Bluetooth OFF
Since the 4S is really pushing us all into managing our phone's like I had to with my Androids, I really wish they would open up control so we could have a selection of one touch buttons that are preset like "Bluetooth off, WiFi on, 3G off", or "3G on, WiFi off, BlueTooth Off".