Chosen Solution
hello everyone and happy Christmas !! I have an iphone 6s plus that detects the charge and appears lightning symbol but does not actually charge and does not absorb …. The voltage on the battery connector fluctuates between 2.5 volts and 1 volts. tested the flat dock connector. I changed tristar and mosfet (u2) without solving the problem. I have not changed trigris because I have 5 volts … could he be the cause or some resistance ??? pretty early
Which MOSFET did you replace; Q2300 or Q4500? Your phone is suffering from “fake charging” and has all of the hallmark symptoms of a defective Tristar IC. Seeing as how you already replaced it, I would probe around the circuit to insure everything is securely in place and consider replacing Tristar again.
