Battery life suddenly dropped around 11/1

Hi all, my brand new Thinkbook 16p Gen 4 system is awesome and used to have great battery life. However in the last few weeks I've noticed a huge drop in the battery life. Even if I charge it to 100% is dies in the matter of an hour or so. This used to last me 2-3 hours at 80% charge (I always use Conservation Mode).

Has anyone seen something like this with i9 chips? There was a BIOS update during that time and of course several Windows updates as well. It's like they don't know how to use the Efficient Cores any more or something strange like that. My plan is to just back out the BIOS update from Lenovo but thought I'd check the forum first.

Thanks!

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