I was given this fix that might come in handy for some from Generic Account on YouTube, Many thanks
Here is the fix for the battery meter:
1. Open a new command prompt (run as Administrator) and run:
powercfg -setdcvalueindex SCHEME_CURRENT SUB_BATTERY BATACTIONCRIT 0
This will allow the battery to run down completely without shutting down/hybernating before it runs out.
2. Discharge the battery fully; use it until it turns off.
3. Charge the battery until full capacity. DO NOT turn the tablet on while charging. To allow for a full charge leave it charging overnight or about 8 hours.
4. After charging is complete turn the tablet back on and the battery meter should now be fine. You can check this by running HWInfo and looking at the battery capacity – it should show approx 31000mWh