What was it like on stable 7.0.3?

If battery life is better on the stable one i would revert back for the time being. Those figures are poor.

 

Have you tried clearing your battery stats? If I were you I would charge your phone to 100% and then boot into recovery/advanced and clear battery stats. Then do a full discharge of your battery and see if that helps.

 

This is a link to an article about the Nexus S battery. It's insightful, and, trends toward my personal experience regarding the battery as well.

COURT TECHNOLOGY and TRIAL PRESENTATION: Samsung Nexus S: BlackBerry Replacement or iPhone Alternative?

 

Hi there! Maybe it makes sense to try using Advanced task killer app, and also try to use an extended battery? There are plenty on the market from mugen power for example.
I have a mugen power 3300mah battery. Bought it after I read a review on XDA developers and here as well.

 

You should never recommend a task killer. Task killers can kill processes that don't need to be killed. (system processes, etc.) It can also be detrimental to the health of your phone. Android 2.1+ manages task killing really well.

 

All killers don't work on gingerbread, you cancel and it then restarts so don't bother. Couldn't get a day out of mine either. I'm a heavy God, email and web user, I restricted this slightly but best thing I did was out on apn Droid. Thus turns everything off and doubled my usage over night.

 

-task killers : why kill a process on NS when it shows less available ram after killing it ? [ex. : killing the google sms app]
-as for the build no. ,i have #112 and i get full 2 - 2+ days of battery [talking ,playing ,web browsing and everithing ,but no too excessive] and the screen takes like 39% ,cell 19% system 2% & other stuff 5-6% ,so there is an average over all the used apps and the *% changes all the time !