Nothing earth shattering here,but I found a way to make it a little easier to replace the battery in my tanks. When replacing a battery I turn the tank on its side and keep it from falling over with one hand, leaving one hand to replace the battery. Since its a tight fit and you have to route the wires just so, it can be tough with one hand. Solution? I put a piece of velcro on the battery to hold it in place while I route the wires and put the battery lid back on. It works ALOT easier. By velcroing the battery in place, it doesnt try to fall out or get in your way when your routing the wires.