If you inhale battery dust it's not going to end well for you, nanotubes or not. There's a difference between lining your walls with a foot thick of the stuff,

If you inhale battery dust it's not going to end well for you, nanotubes or not. There's a difference between lining your walls with a foot thick of the stuff, and having a small amount in batteries. FYI we still use asbestos today, and it's a good idea as long as you're careful with it.