JC battery flex TAG for iPhone 14 Pro / 14 Pro Max

Service battery flex from JC for Apple iPhone 14 Pro / 14 Pro Max. Flex for battery cells (battery cell).

Update FIX for iOS version 17.4

After updating to version 17.4, it is necessary to use the 3U Tools program to set the battery capacity to 100% and 0 cycles.

Download the 3U Tools program here.
*It has not yet been possible to verify how the battery capacity percentage will decrease over time. As soon as we have tested it long enough, we will add this information.

Articles for iPhone 11 and newer still require the use of TAG-ON flex.

*This guide also works on older iOS versions

1. Backup the phone memory to a computer, in the new process, it is necessary to perform System Flash via 3U Tools and then restore the data.
2. Set the original battery (or a battery with original BMS flex) using a TAG-ON Flex programmer to a capacity of 100% and reduce the number of cycles to 0.
3. Thoroughly rewire the original flex to the new cell and permanently connect the Tag-On Flex.
4. Insert a non-original battery into the phone and turn it on to trigger a message about a non-original battery in the settings - battery - battery condition and charging.
5. Turn off the device and remove the non-original battery, insert the re-soldered cell with the original BMS flex and Tag-on Flex with modified capacity and number of cycles into the phone.
6. Connect the phone via cable to 3U Tools, download iOS 17.4 and select the Quick Flash Mode option, download version iOS 17.4 and check the Fix battery health during Flash option, then click on the blue Flash button (see image).
7. After installing, activate the phone and check in the settings - battery - battery condition and charging.
8. Done, you can now restore the backup from step 1.