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GO Battery Saver
GO Battery Saver is another do-it-all battery program that's easy to use. What I especially like about it is that it makes it easy to spot what apps are hogging the power.
Like JuiceDefender it comes in both a free version and $4.99 version which gives you more personalized control over your device's power use.
InfoLife's Battery Defender is another excellent free, battery saving program. I confess one its features I like the most is actually the simplest: It shows your battery life percentage on the notification bar. OK, it's not exciting, but I like knowing exactly how much juice I have left in my battery tank.
The price is also right: Free.
Battery Drain Analyzer
That's it for the easy programs. Sun Light's Battery Drain Analyzer has a simple profile manager, but what it's really about is looking under the hood of your device to analyze your app and power usage.
While a power-user app, it does give you an excellent and realistic battery life estimate. Unlike other programs, Battery Drain Analyzer works hard on analyzing not just what your apps and components are doing at any given moment, but how you usually use your device. It gives the best estimate I've seen from any app on how much time you really have before your device shuts itself down.
The basic version is free, while Battery Drain Analyzer Pro costs $2.19. I have to say I see little reason to upgrade to Pro. All it does is add some eye-candy to a perfectly functional app.