Definitely would discourage you from switching batteries (or lenses) with the camera turned on you can really cause a short. I was answering you on a cell phone, on a train at rush hour, so things did not go well! The comment about switching lenses is more of a bonus advisory.
You can turn off sensor cleaning and just do that as you wish, even assigning it to first place on a custom menu for fast access. Better that and turn off the camera to switch batteries or lenses than risk killing your camera.
I wish you luck with the check, but hope this time will serve as a cautionary experience.
cheers, TREVOR
The mark of good photographer is less what they hold in their hand, it's more what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
