JuiceDefender helps an Android phone get more out of each charge by shutting down functions when they’re not needed. Choose the power-management settings that suit your needs: The least-aggressive setting shuts down connectivity when your screen is off but reconnects every 15 minutes to update email and Facebook notifications.
Advanced Task Killer shows you a list of apps running on your phone in the background, allowing you to shut each one down with a click. The service can be useful, if you know which apps are energy suckers.
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