Did you try another charger? Try if you can with several different. If not, check the pin where you plug the charger (that is, on the tablet) it may be dirty ... You can illuminate with a flashlight inside the pin ... and in any case, carefully with a pin, you can dig. Sometimes fluff gets together there.
But, clearly, it may be the battery, but that option would already be more expensive ..
A hug...
Good morning I told you that I cleaned everything and remained the same then I opened it and noticed that the battery flex was partially out of the housing, I put it back but the lock was broken, so I had to cut a cut of an x-ray for the pins They made contact, the probe and began to load, what is not the duration since it does not have many requests to my little understanding
Do I leave it that way or is there something more effective?
I think that what you did is fine. If I misunderstand, do you have problems with the battery life? if so, that may be solved only by changing it (the battery).
A hug..