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I want to know if is there a way to prevent my iPhone battery from charging, when I connect it to my MacBook.

I want to try my applications when I'm working, but I'm afraid that I will damage the iPhone battery.

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This isn't a way to prevent charging, but the answers at… suggest that overcharging is unlikely to damage your iPhone. – Daniel Sep 23 '11 at 15:04
Damage the battery how? There is no such thing as "overcharging" and having your device connected to a computer or an AC adapter will not harm it in the least. – user10355 Sep 23 '11 at 16:56

You won't damage the battery. Your phone will be fine.

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Perhaps try it plugged into a unpowered USB hub? I can't guarantee it will help, but it might work.

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