I have the spare battery and external charger, so I have been calibrating the 2 batteries by allowing them to drain all the down. Then full charge in the external charger. I can get maybe 14 hours with the screen on 4-5 hours and only syncing Gmail when necessary. However my outlook is always syncing.
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My battery status app says that I should be able to get 20 hours. When I first started to use the app it said like 8 hours, and but it has went up after every calibration.
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Here are my first day stats too. They sucked but got better obviously.
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