Chosen Solution
I have this problem: battery is charged at 100% and if I unplug power, in few minutes battery drains and iPhone turns off itselves. When I turn on it battery is 10%-20% and loop repeats! I replaced battery but problem is always the same one. can I try to replace Phone 6 Lightning Connector and Headphone Jack Part? Suggestions?
It’s an issue with the logic board, it can’t read the data from the battery properly. You’ll need to take the phone to a shop that does micro-soldering / board-level repairs for phones to get it fixed.
