Where to mount the battery?

[EricH]

Originally Posted by yash101

That seems like a good battery mount. However, as of what I understand, it is made of Aluminum, so I think it may be a short hazard!

Better insulate your terminals then--and make sure the battery goes in terminal-side-up. All metal battery holders (which seem to be the vast majority of battery holders...) have that problem. I've not seen too many shorted batteries on metal robots, and I've been doing this for... well, let's not go into how long I've been involved.

This is off topic, but not worth making a thread for:
Many robots won't reach the weight restriction. Are we allowed to place dense materials, like a block of lead or steel, etc. in places on the robot to reduce the CoG?

My first reaction is to laugh my rear off at that first sentence. Many robots will be OVER the weight limit! Trust me on this. That said, SHOULD you HAPPEN to find yourself underweight, under the 2013 rules (2014 may be different), there was no limit to doing that as long as hazardous materials (like lead) were properly handled. But coming in underweight is akin to finding the Holy Grail (your choice of Monty or Indy to find it).