@costilla ,Araceli, It may well be a faulty battery. The battery, cable/charger or charge port may be faulty damaged. Look in the charge port and blow/pick out(carefully) any dust/debri that may be causing an issue also look in the port for any bent pins and straighten very carefully with a tooth pick. Try a different compatible charger/cord to see if that is the issue. If different compatible charger/cord does not fix and port looks/test good, the battery or connection could be bad, if able to clean battery connections and reconnect/install battery, still not charging battery probably faulty. If port is found to be bad/loose/damaged, this is really not a repair for the inexperienced because the charge port for your device is soldered to the mother board and the heat generated could cause further damage if not very careful. I will post a link to a tear down guide to get you inside the tablet to check the charge port, all connections, check/replace battery and a 2nd link how a USB port is repaired/changed in case you feel confident and would like to give it a go. If not wanting to attempt repair take speaker in to a good local small electronics repair shop and have them take a look and estimate repair. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.
[guide|60120]
https://www.youtube.com/watch?v=rTim6FIJPz8