12-01-2018 08:20 AM
it is on page 143 of the "Advanced" manual. That is not the manual that comes with your camera ... you have to download the advanced one.
I got it. But I imagine this can be changes with a firmware update if Canon is so inclined. I don't use my IS that often so I'm not that concerned. I have (5) batteries that I keep charged. My 80D uses the same batteries.
I would put the odds of that happening at slim to none.