Just bought an OG SE 128gb for 100$. The battery health is 94% and the guy told me it has never been repaired.
The problem I’m facing is that the battery is draining very quickly from 100% to like 80% (I can actually see it drop 1% every couple of seconds).
After 80% it starts to slow down normally.
What could be the cause for this?
Probably cold and old. Id recalibrate the battery by taking it from 0 to 100 to 0 multiple times.
I wouldn’t go to 0% ever though as each time it dies something to it and drips the “Battery Health” a few %. Even Apple recommend never go to 0%