Another EV related question from me, I would like to know a few things about regen braking... 1. For typical cars, how efficent are regen systems, ive seen 31% quoted http://engineering.wikia.com/wiki/Regenerative_braking as in how much of the kinetic energy of a vehicle is recoverable 2. Since batteries cant allways take the high amp current transfer in the time it takes to brake some EV's use supercapacitors to store the energy and then recharge the batteries slowly, but why recharge the batteries if you can just use the energy straight from the capacitor. 3. If i am recharging the battery using regen does this mean i have to somehow limit the maximum charge of a battery to prevent current being pumped into a full battery?? Cant i just send it to a capacitor? But what happens if the capacitor is full, where can i send the charge?