My MiniST developed a bad rattle, which turned out to be the battery in its mount. I now use two of those little bungee cords (the little ones with metal ends) and the rattle is fixed. Because most of my miles are on mountain bike trails, this is a good fix.
I put them around the battery and controller, just above the hoop in the frame for the battery.
I put them around the battery and controller, just above the hoop in the frame for the battery.