Yea that vest is unreal,it weighs about 23 pounds. Maybe it's a combo battery pack bullet proof vest if your shot in the back. I was thinking of making a removable battery box that could be attached to the base of the MR somehow. That would make it self contained and give a more stable base for it to stand on. It's quite tipsy the way it is now. I have a pair of 4s 5000ma Lipo batteries that I used in an RC boat. Running them in series would give about 30 minutes on high. The heat sink would need to be addressed though.