Battery replacement with FPC flex cables to remove Apple error messages

Using our repair guides, disassemble the iPhone and remove the battery so that you can handle it freely.

After disassembling the iPhone and removing the battery, identify where the flex cable connection is located on the battery, which connects the battery to the device's motherboard.

After identifying the location of this connection, carefully remove the protective film to reveal the protective board where the battery contacts are located.

Next, cut the contacts in the middle of the connecting pads to avoid damaging the protective board or the flex cable (prefer using ceramic scissors to avoid unnecessary complications). If you are using regular scissors, cut the contacts individually.

On the cable you cut, bend the remaining protective contacts until they break at the narrowest part.

Using your nails, remove small black squares from both ends of the protective board.

Very carefully straighten the flex cable to align it with the protective board so that when placed on a table, they touch as much surface area as possible.

Peel off the white protective film from the yellow adhesive strip and stick it to the center of the protective board on the side where there are no remnants of the connecting tabs.

On the new battery you purchased, locate the connection port and carefully attach the connector of the cable you modified.

Bend the cable and use adhesive tape to attach it around the perimeter of the new battery.

Use the small black T-shaped adhesive tape that was included in the package to cover the connection port to ensure the flex cable does not detach.

In this step, we will use large black stickers to attach the remaining part of the cable to the perimeter of the battery.

Return the new upgraded battery to the iPhone and test the functionality of the device and the newly revitalized battery before sealing the display back in place.

• If the iPhone does not turn on after holding the power button, connect the charger, and it will turn on automatically.
• If the battery indicator shows 100% charge, you have installed the battery correctly.
• When you turn on the device for the first time after replacing the battery, it will not display its health status.
• If any issues arise, various solutions to the most common problems are provided at the bottom of the guide.

Using our guides, restore the iPhone with the upgraded battery to its original condition.

• On the second startup, your iPhone will show a lower battery percentage.
• After the second startup, the battery health will be 100% and the message about the unrecognized replaced part will disappear.
• If you have correctly attached the original battery's protective board to the new battery using this guide, the iPhone will function without any issues.

Weak contact between the original protective board and the new battery
This problem is indicated by the phone showing 1% battery on the first startup.
Solution: Check if the connection between the protective board and the new battery is secure.

iPhone shows the health of the old battery
If your device shows the health of the old battery, it means the modification was unsuccessful.
Solution: Repeat the entire process with a different battery.