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iPhone 3G owners who had updated to iPhone 3.0 also said their phones were draining extraordinarily fast. “There’s a drastic reduction in battery power to my iPhone 3G since I installed the 3.0 software,” said Paul Irvine on the same support thread as Cowan. “Within 2 hours, power drains from a full charge to the alert for 20% power remaining, then the 10 per cent alert followed by it going dead.”
Although suggestions by others to delete email accounts, especially Microsoft Exchange accounts, then restore those accounts, fixed the problem for some – leading users to speculate that the vaunted “push notification” that debuted in iPhone 3.0 was the culprit – the solution didn’t help everyone.