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Revamped version of the iPhone 3G with faster processing speeds. Repair of this device is similar to the 3G, and requires simple screwdrivers and prying tools. Model A1303 / 8, 16 or 32 GB capacity / black or white plastic back.

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iPhone 3GS battery drains fast after restore

My old battery drains fast (like 10 hour standby from full charge) so I bought the replacement battery from ifixit. I replaced it. My iPhone kept rebooting every 3 minutes. It turned out that the battery was defective so ifixit sent me a new one.

I received the new battery 3 days later. I went to replaced this new battery. The standby time was better. 18 hours and the battery indicator only showed 88%. No phone calls, no web surfing. I just let it sit on the table. I installed the Nextflix app to test the battery more. I finished the movie when the battery indicator showed 44%. I left the iphone on the table without charging it and went to sleep. Woke up in the morning and the iphone was dead. I went to charge it to 50%. Tried to use it but it kept rebooting. Restored it with ios 4.0 (no backup). The rebooting issue went away but now the battery drains fast. Only 10 hours standby like my old battery. I always have every battery-draining feattures turned off such as Enable 3G, Cellular Data, Internet Tethering, Bluetooth, Location Services, Fetch New Data Push. All off. Brightness is at 1/3 of the bar. Again no phone calls, no web surfing or watching videos.

Any idea as to why my iphone did that? or is it the battery again?

Thanks guys.

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check the antenna prong next to don't remove sticker is making contact with the bezel. if this isn't it may be draining battery as phone is constantly pouring energy into searching for signal.

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I would make sure that the battery is properly grounded and connected. I would also check the dock connector for a short/obstruction. The best way to clean it is to use a tooth brush.

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Hey Chris,

Thanks for your response.

I did as you recommended. Took out the battery and put it back in. Made sure it sit properly and all the screws were tighten. Cleaned the dock connector with a tooth brush. Still didn't help.

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P H will be eternally grateful.
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