Can I unplug my iPhone 4 while it is updating on my laptop?

It's already fully charged and I'm afraid that the battery life will lessen. Should I leave it plugged?

Added (1). Updating to iOS 6

Do not unplug it while updating. Leaving it plugged in will not hurt your battery life at all.

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If you unplug it WHILE it's updating it will just stop the update and stop charging.

If it's fully charged there's no reason to keep it plugged in.

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