Yes, a nail is extreme but if a battery can take a nail, it will be fine on the track.

My first time at OCRC (a month or so ago) in Huntington Beach, I saw a car take a landing bad and poof...Up in smoke and flames!! It wasn't a NiMH powered car, it wasn't an A123 powered car. You guessed right, it was a LiPo powered car.

IF you are experienced and careful, LiPos provide a great value. They are not for your average high school kid basher.

If you want the ultimate in high output current capabilities, it's hard to beat the value of a 30C continuous / 60C burst current of A123s cells.

If a better and safer power source than the A123 hits the market I'll be all for it.