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Released September 25, 2015. Model A1688/A1633. Repair of this device is similar to previous generations, requiring screwdrivers and prying tools. Available as GSM or CDMA / 16, 32, 64, or 128 GB / Silver, Gold, Space Gray, or Rose Gold options.

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Replacement battery issue - not charging/shutting down.

I’ve got a bunch of iPhone 6S’s that I have been replacing the batteries in. Some, they work absolutely flawlessly and behave exactly as you’d expect. Some are working when I initially install them into the phone to check they are working properly before sticking the pull tabs onto the battery.

Once I’ve stuck the pull tabs on and reinstall the battery, it takes slightly longer than usual when holding down the power button for the phone to boot, and once it does it sits at 1% for a few seconds then jumps around. It also won’t charge and will randomly shut down. Battery health on iOS says it needs servicing despite it being a brand new battery. This is the same battery that when I initially slotted it into the phone to check it was all OK was reading as 100% in battery health. I’ve checked in 3utools and the phone seems to think its the same battery that was installed in it originally (same serial number.)

Other 6S’s I’ve done have come up with a different battery serial and these are the ones that work fine. What’s going on here? Battery issue or phone issue, and can it be rectified? (Pointing out all batteries are from the same vendor.)

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The service message sometimes is caused because of a bad connection of the middle pin on the battery connector coming from the battery.

It can be fixed sometimes by applying more pressure onto the connector or cleaning the connector. Worst case you may need to replace with another battery that fits better onto that connector or get the battery connector on the logic board replaced.

Some replacement batteries may have the same battery serial numbers for simplicity sake when mass producing replacement batteries.

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