Hi @Deyaluna, sorry to hear about this. 
Your question has been translated to English as this is an International forum.
Do I understand correctly that the battery percentage is changing when the device is powered on, but it still only charges when its powered off? If that is correct, could you try charging your device while it's rebooted in safe mode? That way we can make sure that no downloaded application is the cause of this behaviour as they are temporarily disabled in this mode.
Let me know how it goes!
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@Deyalunawrote:
No carga cuando está prendido tiene que estar apagado, además en la pantalla aparece el porcentaje de pila como si estuviera cargandoIt does not charge when it is turned on it has to be off, in addition the percentage of the battery appears as if it were charging
-GT
I wondered is my battery good after 2 years of usage. Everythere i tried to find apps or any others things to check is my battery good. And one day i found AccuBattery app, which is free (some option it's paid, but actually it's not very important. About all these things you can find in Google Play AccuBattery's page), good looking and very informative. I recommend you to have it. After some days of seek yours battery you can see it need to change it and ect. Coz yours problem is with charging i advise you to check with this app too. Maybe it's time to change battery in yours mobile 
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