UBook don't work without 220

At first, the battery was charging normally and holding a charge.
Now the battery is very hot when Ubook is working.
Ubook always shows 100% charge.
If you turn off charging at 100%, then Ubook immediately turns off.

On Kickstarter chuwi recommended update driver.

Please try to reflash EC: https://drive.google.com/file/d/1yYfaZ_IryC1iT3OaKA-AUUEU7NpAP4ve/view?usp=sharing
I did it, but nothing has changed.

Please tell me more about how the driver updates and what should happen after.