Hi, and thanks for reaching out. I am Zainab, an Independent Advisor and a Windows user like you. I'll be happy to help you out today.
I understand how important it is for you to resolve the battery-draining issue. Nothing to worry I will do my best to help you out.
Kindly follow the steps below:
Unplug the charge and use the laptop until the battery drains to 15%.
Turn off the laptop and turn it back on after 30mins.
Once done, reinstall the battery drivers.
Right-click on the Start menu and select Device Manager> Select the arrow next to Batteries to expand it > Right-click on the Microsoft AC and ACPI driver and select Uninstall.
Restart your laptop so that Windows can automatically reinstall the battery drivers.
Also, make sure you have the latest BIOS update.
You can check this link for reference:
https://h30434.www3.hp.com/t5/Notebook-Hardware...
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
I hope the above information helps. Please let me know how it goes.
Best Regards,
Zainab.