Battery Saving Help

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http://forums.androidcentral.com – I guess it's another one of those threads haha. So after bloating my N4 with apps and everything, I'm beginning to realize that I'm losing more and more screen time. By no means am I unsatisfied with it, but I would love to be able to lengthen my battery life. So can anyone against post some of the small things they've done in order to get more screen time? Also, is it worth getting a battery saving app (as in do they work?) And if they do, what is the consensus for some of the best ones that won't hurt my N4? Finally, I've heard the Franco kernel really increases battery life. In (HowTos)