Charging, but very slow

My battery was charging well, but suddenly, after 6 months of use, it only charges very slowly. About 1 or 2 % an hour. On the display it also says: “Charging slowly” (wird langsam geladen) I did the test as recommended, it says, my battery is fine.
Does anyone have this experience?

A post was merged into an existing topic: FP3 Slow Charging