I've been testing my battery on my 4S for weeks now. My daily logs go back to October. I recorded the battery percentage and usage time. So my numbers aren't just what I *think* I'm getting, I actually know what I am getting.
Other than the defaults;
- the battery has been full-cycled (full charge to auto shut down) at least 5 times.
- all System Location Services are disabled (Setting Time Zone, Location-Based iAds, etc).
- brightness set to 33%-40%.
With both 5.0.0 and 5.0.1, I've yet to hit the 7 hour mark (420 minutes) of use. 396 minutes has been my longest time up before the phone shut down. Upgrading to 5.0.1 made NO difference.
This is mostly on WiFi, but some 3G usage. Mostly text messaging and web browsing. Very light game usage, if any (uptime is of course way less than 6 hours if I do play games).
Apple's web site lists 6 (3G) to 9 (WiFi) hours of "Internet usage". I'd think I'd be getting closer to the 7-8 hour mark, instead of *barely* 6 hours.
This isn't terrible, but of course I wish it were better.