Fifth generation of iPhone. Repair of this device is straightforward, and requires screwdrivers, prying tools, and patience. GSM/CDMA / 16, 32, or 64 GB / Black or White.

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Why is my battery losing power?

My battery loses all power in a few hours. I tried a new battery, the problem continues. I notice also that when I turn off the phone (slide across to turn off after pressing and holding button), the phone re-starts automatically. I cannot therefore turn it off. this should indicate something.

I read somewhere that my problems indicate that power charge port on the iphone is faulty and might need to be replaced.

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Are you certain the new battery is good and was fully charged?

This kind of problem is usually a bad battery first, a charge port (or cable) problem second and charging circuit on the logic board third.

You will need to use a known-good battery to eliminate that possibility. Then you could try a new charge port to see if that helps. Always use genuine, known-good cables when troubleshooting.

If it is a problem with the charging circuit, that requires a micro-soldering repair and is probably not worthwhile for an older device like the 4S.

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I would add the the immediate restart makes it sound like the power button may be stuck. Does your screen go to sleep at all? If not, I might suggest trying to reseat and/or replace the power button.


If the phone turns itself on again after turning it off via slide to power button. The usual cause is dust lint, damaged / shorted charging port. Replacing it or cleaning it should fix it.


Yes, the battery was the problem. Replace and is working


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