For better (longer) life for your battery you can try program Battery Calibration from market. It's working, I don't now how, but it's working. Probably this program fixing voltage meter in phone.
One word about KA14 - it's really fast Thanks krabappel
I said that I'm gonna fullCharge the phone, and then, I'll check the battery life. I just made a back-up and then flashed the rom, so I think that all that work just drained the battery. Anyway, I can tell that the battery life of the ICS roms, are better than the latest GB roms. KA roms are nice, so I'm sticking to them.
Nice work.