I velcro my battery to the bottom of my Stratux. Then, I have a couple of strips of velcro (the furry side) across the bottom side of the battery. I sit that on a piece of black rubbery shelf liner cut about 12" X 8" that I lay on the glare shield. I got the shelf liner at WalMart. Since I use an external GPS plugged into my Stratux, I lay it there also. Works great.
I use a RAM windshield mount for my iPad and, since I am left handed, put it to the left side of the yoke. That works great also.