[tworats]

A few months ago I was about to get rid of my quite old Galaxy Vibrant, so with nothing to lose I installed CyanogenMod on it. It's worked so well I'm keeping it as my main phone for now - it's clean, stable, and looks much nicer than the Samsung ROM. The only downside is significantly reduced battery life, but I can live with that for now.

Will definitely be trying CM10 if it's supported for the Vibrant.

[dguaraglia]

Try using BetterBatteryStats to find what application are causing the most 'partial wakelocks'. Once I cleaned those up and moved the default scheduler from 'interactive' to 'ondemand', my battery life went up a lot. Even better, if you can get a third party kernel supporting the 'badass' or 'smartass2' schedulers, you'll get even better battery life.