CA Traveler wrote:
Mine are held down with a strap.
Me too. I couldn't find any boxes to fit my T-105's so I had to use a standard marine box. It is to short. I bolted the box to the hitch of my TT and then use a strap over the box cover which sets snugly on top the batteries and around the frame so that the strap is holding the battery's down in place.
Been that way for 5 years now. They never move.
I have replaced the straps once though. I use standard ratcheting straps (only short ones) and after a few years the mechanistic on the first set of straps got so corroded from the battery gasses and road spray that they would not longer ratchet. I thought is was a good idea to replace them anyway so that I was sure the strap was still in good shape.
If you are worried use 2 sets of straps per battery. As long as you are strapping them to something solid they will stay. Those straps are design d to be strong. Just make sure you check the load strength of the strap before you buy. Some of them are quite cheap. You need the good ones.