My 2016 MacBook Pro has done something peculiar for some time now and Im curious about it. The current health is 93 percent at 86 cycles. now normally if im just surfing or doing something light keeping the wattage used low the heath won't decrease at all. however if im on battery power and doing something where the cpu/gpu is being taxed such as when editing photo or video I will notice that along with the battery percentage lowering the heath of the battery will also drop. for example the other week I was out at a park and editing some light video using FCPX and the battery went from 90-40 percent charge but also dropped from 93-86 percent health in the same amount of time. now when I got home and put the machine on charge the heath went back up to 91 percent after a while then down again to 89 before finally going back up to 93 percent. now it didn't go back up to 93 percent health for several days and several full cycles of light discharge. I guess what im getting at is draining the machine faster ie. when taxing the cpu harder on lithium batteries vs lightly letting it go down over several hours.
