When your boss comes to you and asks that you make a Thing-o-Matic Helmet you do what he says. And have fun in the process.
So, I needed to power some LEDs without being tethered. 9volt ftw. Rather than letting them dangle or gluing the battery to the helmet, how about a nice holder.
The 9 volt battery holder.
You will need to scale the model by 1.06 in Replicator G.