I don't think it will make a difference, it was a long shot at best.
Are you using my latest efi? And latest bios from HP?
HP added the BIX method in the latest bios update and I reworked my ssdt and the config patches. To make sure you're using the latest, the patch for BTIX to XTIX should be 8 bytes long. The previous patch changed all instances of BTIX and created a problem for extended information, so you would get the charge cycle count estimate, instead of the real one.
Without this acpi error, battery chime seems more consistent in my rig, so it could also be related.
Other than that, I have no idea, sorry.