Okay, I’ve collected some results from different tests and I think there’s definitely something up.
So starting from a discharged battery, and connecting the charger to it my GPU hovers around 35-40W while playing total war warhammer.
After it charged up to full, I still wasn’t seeing the GPU go to full power.
After rebooting the game while at full charge:
It only goes up to 100 briefly, I assume when the battery is full and beginning the discharge phase, because it drops back down to how the 2nd image is.