5S battery percentage not updating after new battery.
My iPhone 5S is no longer updating the battery percentage after replacing the battery. It seems to be charging and otherwise working fine.
Right after the repair, the battery showed 49%. I plugged it in, saw it was still 49% and walked away. After a little while, I checked again and saw the battery was showing 61%. That was the last time I saw the percentage change on its own.
It stayed at 61% until the next day. I performed a soft reset (by holding Power + Home), and it came up as 100%. But, it stayed at 100% while discharging for a couple days of use. After another soft reset, it showed 3%. I’m now charging it, again.
Especially since the battery % did initially change from 49% to 61% right after the repair, I’m hopeful I didn’t damage any components on the board. Is it possible the battery went bad during the first charge? Is it possible the battery connector became a little loose during the first charge? Might I need to do something else?
Update: It looks like battery connector on board is undamaged:
1) Random resets - with or without charger plugged in.
2) Battery level drops ~5% per hour without using phone and screen off.
What else should I investigate?