A few times a month, usually when I use GPS (but sometimes also on other occasions), it happens that my phone starts discharging extremely fast: about one percent every 5 seconds, until it hits 0 and turns off.
However, the battery is not really empty at that time. As soon as I connect a charger, it seems to reset the charge level: the charge light turns yellow, not red. After connecting the charger, even if it is for just a second, the phone is able to boot again and shows about 25% charge. Then it continues to work normally, until the battery is actually empty.
It also happens at time when using GPS, that the battery level drops by 10% in an instant. But, when this happens, the phone feels very hot which is not the case in the scenario mentioned above.
Does anyone have an idea about these weird battery issues?
I have the latest FP OS 17.11.2. It does not appear to have started with one particular update. These issues have already been happening for quite a while, but seem to be getting more frequent lately.