Let me qualify that. We have tried the Triple Bob from Grin Technologies with all of the Reention shark-type cases we use and most of the Hailong shark cases and it dramatically improves the strength and rigidity of the mount every time. We are now recommending them with all of our downtube batteries. While they improve every mount, they are most important on Jumbo Sharks and Mega Sharks. These weigh from 9 to 12 lbs and are taller so there is more side to side leverage pulling on the mount. With a Triple Bob, the battery is on there rock solid and doesn't move.
For even more flexibility in mount location and dramatically added strength, the Triple Bob also comes with recesses for hose clamps. It even includes 2 different sizes of high-quality stainless steel hose clamps. They even include some flat shrink tube to dress up the hose clamps for a clean professional look that also protects the frame. You can put up to 3 hose clamps on each Triple Bob. Two is enough by themselves or one for extra strength if you are also using the water bottle mounts.
There is one other cool feature I should mention. At one end of the Triple Bob is a chamfered, counter-sunk, bolt hole like the other ones but this one takes a flathead screw, also included. This can go under a part of the battery mount that is flat such as the part on some batteries that holds a controller or the part where the power connectors are located.
Then position the battery in the frame and lock it down with hose clamps through the Triple Bob. We do this all the time to install batteries in frames that are a tight fit with no room to take the battery off once mounted. We used to do it with zip ties and holes drilled into the battery mount but Triple Bob's are so much better. For more info on mounting batteries in a small triangle or full suspension bikes see this article.