@Cheddarman73 Welcome to HP Community!
I understand that the laptop will not charge above 31%.
Don't worry I'll try to help you out.
Please let me know the correct product number.
In the meantime, please try the below steps and let us know the result.
Unplug the charger and use the laptop until the battery drains to 15%.
Turn off the laptop and turn it back on after 30mins.
Reinstalled Microsoft ACPI-Compliant Control Method Battery under device manager:
1) In the search box, type, and open “Device Manager”.
2) Expand “Batteries”.
3) Right-click the "Microsoft ACPI-Compliant Control Method Battery" that is listed there.
4) Click on “Uninstall”.
5) At the prompt put a check in the box to remove the current driver
6) Shutdown the computer.
7) Remove the battery for a minute and then put it back in.
😎 When the computer comes back up it should automatically find the driver.
9) Go to Device Manager.
10) Expand Batteries.
11) Right-click the "Microsoft ACPI-Compliant Control Method Battery" that is listed there.
12) Click "Search automatically for updated driver software"
Do the same thing with Microsoft ACPI-Compliant Embedded Controller.
Restart the computer and the issue should be fixed.
Additional help can be found in the below articles:
Battery Charging Delayed When Operating Notebook in High Ambient Temperatures
Battery Does Not Charge when Using a Voltage Adapter with the Power Adapter
Battery Indicator Light Turns On and Off While Battery is Charging
let me know how that pans out,
And the answer to the above question will help me, help you!
Keep me posted, and if any of the above questionnaires helped resolve the issue,
Mark this post as an "Accepted Solution".
Good luck.
