I've not noticed this behavior at the office when it is plugged in and away from the office the only reason its plugged in is because I'm charging it. I just want to take Batter Bar Pro's driver out of the equation before further diagnosis.I've just removed it, let's see if anything changes. I'll put it back to sleep now and try again in an hour to see.
Yes? Something has changed? Do you mean in the last firmware update? Surface Embedded Controller Firmware (v103.899.256.0) adds battery charging enhancements and thermal tuning.
Can anyone else confirm that they're getting the same battery usage on their SP4 while asleep, or awake, while plugged in at 100%?