Battery life has degraded of Iphone 3G

I have Iphone 3G, its battery life has gone low. If I run any application, the battery just work for 3 hours or less, even it is fully charged. How can I upgrade its battery?

iPhone 3G, iOS 4.2

Posted on Jun 5, 2011 12:25 PM

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Battery life has degraded of Iphone 3G

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