Lithium batteries

The Formula E grand prix style electric cars sound like huge slot cars whizzing by. Very strange to see first hand. you can be on the wall with a camera (I get photo passes) and not even know they are coming as you can only see about 100m down the track because of the fencing. you only hear the transmissions and the tires scrubbing. The jump starter packs you can buy are nothing more than 1 or 2 AGM batteries (like fire panel back up/E-bike batteries) in parallel, they weigh about 5 lbs a piece. if you car has a good tune, and the choke works, it should start up in about 1-3 seconds and then your batteries are back to charging.