That is fascinating. I was about to get one to test....dont bother, since I dont have 'blind' faith......"It fell short/didn't work because you didn't have faith. :-( . You must have 100% blind faith to have your battery needs be saved by the battery pack. :-)"
BTW, I got an advance degree in chemistry and taught college chemistry, I think they just forgot to: 1) put in some charcoal 2) rewire the anode and cathode, 3) submerge in sulfuric acid 4) then you would have a big FeCarbide battery....