jsyk, BPD stands for Borderline Personality Disorder, not bipolar disorder. I get them mixed up as well because BPD could reasonably stand for both.

The disorders can seem similar, which leads to more confusion, but they are pretty different in some aspects.

Not entirely sure if this would apply in your case, but for future reference you can sort of “recalibrate” the battery percentage by:

1. charging the device to 100% and keeping the charger on for a while (normally a few hours)
2. drain the battery until the device shuts off
3. charge the device back to 100% without unplugging it (keep it connected for a few hours again just to be sure)