I have a recently acquired Arri 16SB that I am tinkering with that has a battery belt that although it charges to green and is in excellent condition obviously has very little capacity left. Seeing as how I am also into electric vehicles and pretty familiar with battery pack construction I am thinking of rebuilding the belt with new technology cells and converting to 12v at the same time. Googling on this subject and watching a couple YouTube videos where guys are running a couple of R/C car battery packs makes me wonder if this re-powered belt would not just be huge overkill - capacity wise? IE: realistically how much battery capacity do I really need for even the most extreme usage? BTW I already know about converting the magazine to 12v (no problem) and havn't decided whether to try using the Arri variable speed motor I already have (until it gives me trouble) or to by one of the newer Tobin 24v VS motors. I already have a 115v motor for indoor use. Any comments, thoughts or input from some "power users" would be greatly appreciated.