The problem is if I go for any other battery it will be too heavy or won€™t have enough juice to last a fight. I could be wrong but I don€™t think you can beat the power to weight ratio of these things.

I understand that the makers of the Tesla car (http://www.teslamotors.comwww.teslamotors.com) are using similar batteries, they had to amour plate the battery box to protect the car if one should blow.

Im just wondering if Lipos could be legal in heavier weight classes so long as the battery area is sufficiently armored.