Originally Posted by
Mitsu3000gt
My iPad Pro definitely drops charge while in use if charging with the included charger. It will gain charge in use when it's charging from one of my Aukey blocks. A quick google search suggests lots of people find either the charge doesn't budge, or it goes down, when in use with the stock charger. In fact when I first got it, I thought my charger was defective which was one of the reasons I bought a third party block. Also a full charge takes something like 5 hours, it's pretty brutal.
It could be a battery protection thing, sometimes batteries cannot be charged at certain rates if they are also being discharged or are a certain temperature.