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wifi drains 5% of battery per hour in SLEEP MODE

9461 Views 35 Replies Latest reply: Dec 6, 2010 10:02 AM by jeffkinn_uk RSS
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RiverCrab Calculating status...
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Nov 9, 2010 12:07 PM
Last night I went to bed with 50% of battery on my iphone 4. Nothing was on except wifi, no app DLed from app store, autolock in every minute. This morning when i got up the phone was dead and i cant even turn it on. After some observation i found out that with my wifi on, it drains 5% of battery per hour. If i turn wifi off, the battery didn't drop anyting after one hour. Is that a common problem or just me? Do i need to go to apple store to change another one?

iphone 4, iOS 4
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