Chosen Solution
Hello. I just replaced iPhone x battery and everything looked fine. Battery health Said 100% and everything went smooth. After 1 day, the battery health is not available, and says it needs service. I then replaced the battery once again. Same thing happened. After one day it says battery needs service and is charging slow. What is the problem? Am I buying bad batteries? Or is there something else wrong in the phone? Bonus info: when turning light on screen up and down it only changes very little (does that have anything to do with battery problem or is it just a bad screen? Please help me!
I would try checking the battery using 3rd party software like 3U tools (PC) or Coconut battery (Mac). If the battery data looks bad on there, I would say you are getting bad batteries. If the data looks good on the software, I would try updating or restoring your phone. There may be something weird going on with the software which is causing the message to pop up. Also make sure that the battery connector on the board is not damaged and that the battery is fully connected as a loose connection can cause the error to appear as well.
