Originally Posted by ShinySideUpAZ

HOWEVER, the greatest consumer of power in any of our cell phones is the backlight. To that end Lumos Wizard is your best tool for staying off the cord. As an experiment two days ago I shut off Lumos, or more correctly didn't install it with the July 22 update, and monitored my battery usage at the end of the day. Now with a decent amount of calls and tweaking done when you get a new ROM I ended day one with 40% battery left. On day 2 I reflashed and also loaded Lumos Wizard. Day 2 had a basically the same level of usage. I ended the day at 76% battery.