Try to reinstall battery driver (choose suitable for your device)
[Hi8 Pro] [Official Version][Dualboot] Chuwi Hi8 Pro Windows + Android + Bios + driver
[Hi8 Pro] [Official Version][Singleboot] Chuwi Hi8 Pro windows + Driver + Bios Download
Or try to update with DPS or SDI software (only battery, don’t update other drivers).