Spectre 360x shuts down instantly when unplugged

[civalj]

Hello, my laptop shuts off instantly when unplugged. For about two weeks it would shut down after (unplugged) on battery for a short period without warning and indicating a strong (+50%) charge. Now it won't last at all and shuts down instantly when unplugged.

I have tried:

• Restarting the computer
• Uninstalling and reinstalling “Microsoft ACPI-Compliant Control Method Battery” driver
• Updating BIOS (was not possible on my build, would not tell why)
• Performed battery and AC tests from HP Hardware diagnostics tool - both show passed
• Performed extensive system test - all passed

I do not have a removable battery. I cannot find any other steps to resolve this problem in the forums. How can I fix this?

[Echo_Lake]

@civalj

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