I've been a lurker on XDA for a while, and recently, I've had a problem with my battery. When I upgraded from Stock GB (unlocked/ rooted) to stock ICS, my battery went from reasonable to unusable. Since that time, I've changed my ROM and my Kernel (currently running Matr1x and AOKP), and calibrated my battery. I've tried some of the things in this and other threads (force stopping programs, turning off location services, bluetooth), to no avail. I got BetterBatteryStats and did what they recommend over in the BBS forum - I charged it overnight, then unplugged it and let it collect stats for a while.
I attached the BBS file over in the BBS forum (attached here for you to see what they saw) and during the 1 h 43 m that this dump file was created, my battery went from 100% to 84% without turning on the screen except to create the dump file.
When I posted over in the BBS forum, they said to uninstall facebook, gmail and turn off wifi and autosync. I'm not too concerned about facebook, but turning off gmail and autosync are non-starters - I'd rather go back to GB than lose those functionalities.
They suggested trying a different ROM. I'm currently on AOKP ROM and Matr1x Kernel. Can anyone suggest a kernel and/or ICS rom that will give me reasonable battery life?
Nexus S I9020A
Nothing is really keeping your phone awake to be honest. Gmail has a few wakelocks, nothing abnormal though, and it's not keeping it awake for long (23s total). Same for Facebook (7s total).
You can see your phone had bluetooth on for 1h43. That's a battery drain, if you're not using it I suggest you turn it off.
Same thing for data. If you're not using it, turn it off. From the log you don't seem to have bad signal, which is good, because bad signal can kill your battery even more.
Do you use your calendar and mostly calendar syncing? It seems to have a few wakelocks, which could end up hurting your battery.
As for the kernel, are you using the latest version? v22 has much better results than the earlier ones, so that might help too. Stability prior to this wasn't super great. Otherwise I had good luck with Air kernel v4.4 and the settings in my signature. I dropped 3% in around 5 hours, arguably without doing nothing however.
I would also look into your screen brightness settings. You can always take a screenshot of your battery stats in Android to show us more.
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