[EricH]

Originally Posted by ICE_Bear

From what I read, there's only one rule for how we mount the battery... Is that correct? Or is there a section or rule other than R33 about the mounting?

That is correct.

I'll go a little more in-depth: Orientation (for use) doesn't really matter, though on the side or upright tends to be best. (For charging, upright is important.)

But what you're really after is making sure the battery doesn't move within the robot. Just using velcro might not do the trick; I know for a fact that duct tape is not going to be all that helpful. Many teams will build a battery box into their robot to hold it in one position, and then use velcro or a buckled strap to secure it down.