Chuwi hi8 pro cwi513 Battery problem

i have a chuwi hi 8 pro tablet and it shut down alone, while the battery is charged.I factory reset the tablet, but the problem still occurs.
Does the battery need to be changed?

Thank you,

Everything seems to indicate that the battery life has come to an end. Check if the tablet works well with the charger on and if the battery level drops rapidly when you remove the charger.

When the tablet works with the battery and may have 90%, it can be shut down alone.

Try calibrating the battery with some app from the play store