Huawei P8 Lite strange battery behavior?

Am
- in P series
3

My mother's P8 Lite battery has been behaving strangely for a few days. It discharges normally, but no longer charges at the socket adapter with a cable (then the battery discharges faster than it charges!) B only on my quick-charging power bank, the cell phone charges very slowly (by "very slow" I mean that it is hung on the power bank at 10 p.m. And has only 96% in the morning at 9 a.m. (although it was hung on the power bank for 11 hours!). What could that be? And how much would it cost to exchange the (non-removable battery)?

De

The battery is definitely dead. Must be replaced, or a new cell phone ran, had a P8 Lite, now P20 Mate.

Am

Uff all right, just looked, of course the guarantee expired two months ago…

De

Is clear, will hold xD until shortly afterwards