Chosen Solution
Phone started restarting at random. Battery shows 1% then after plugging it in it will jump to around 48% unplug it and it drops down to 1%. I replaced the battery, yet still have the same problem restarting and battery not showing correct percent. I replaced the charging port and still have same issue. Phone now will only restart when I try to use it. If it is sitting and not being used then it will not restart. I have done a factory reset on it also. Any ideas what else could be wrong?
Hmmm…I will say that those are symptoms of a bad battery. It is possible that your replacement battery is also defective. Have you tried measuring the voltage directly at the battery connector with a multimeter - if so, what voltage are you reading? Ideally, you would want to confirm that your replacement battery works in another phone or install a known-good battery in the phone that is being repaired.
I’d probably say that it’s a bad connector. Plug everything in, let it turn on and then tap it against a surface in a couple different angles. If it turns off when you hit the phone against a surface then it’s just a bad connection somewhere on the battery or phone
