Replacement battery for HP Omen X doesn't work

I have an HP Omen X 2S 15-dg0020nr. I just replaced its old/original genuine HP battery with an iFixit replacement battery, which appears to be made by BTI as a direct compatible replacement. I charged the laptop to 100% and kept the AC adapter attached for another 2 hours per iFixit's instruction. When trying to run the computer on battery power, it just shuts down within a minute or so. I have all the latest BIOS, firmware, drivers, everything. If I put the worn out original HP battery back in the laptop, everything works, even though the old HP battery has reduced capacity. If I put the new iFixit BTI battery in the laptop, it just shuts down within a minute or so, even in BIOS, let alone in Windows.

After days of diagnostic work, having tried 3 different 3rd party aftermarket batteries, here's my conclusion: 3rd party batteries such as BTI batteries are "physically compatible" with the HP Omen X 2S 15-dg0020nr, but they are incompatible at the firmware level. They might work with less demanding laptops, but not with high-wattage dual screen HP Omen X laptops. Here's what I think happens:

• SMBus handshake failure: The BTI/aftermarket controller passes basic detection but fails to properly report real-time telemetry (such as cell temperature or instantaneous wattage draw) back to the laptop's EC.
• Hard shutdowns: When the system switches from AC adapter power to battery power, the EC detects an unsupported or out-of-spec power reading from the aftermarket BTI gas-gauge chip and triggers a hard shutdown within seconds to protect the dual-screen motherboard.

To make matters worse, even if I try to use the laptop with the AC adapter while 3rd party battery is installed, the EC trips the system's BD PROCHOT safety signal because it doesn't recognize the battery as a genuine HP battery, which throttles the CPU clock speed down to 0.8 GHz and locks it there, rendering the laptop so sluggish it becomes practically useless.

If you know a workaround other than buying a genuine HP from eBay (no inventory elsewhere), or having to re-cell the battery (micro-soldering 6 new pouch cells into the old battery pack, a difficult and potentially dangerous task), I would love to hear your thoughts.