I have a powerchair that has 2 batteries, and yes, they are expensive. I just had to replace them, and they were north of 200 bucks. If you need info on making batteries last longer, I would be happy to help.
When my Dad visits, which is about once a year, when he takes his socks off, my cat comes along and starts rolling on the floor intertwining herself in his socks. Weird cat.
As far as my stuff, she prefers to lay on a blanket or sweatshirt that has my oder.