Comment Re:No mention on capacity though (Score 1) 395
Several reasons:
* Capacitors may require a lot more space and weigh more for the same stored energy - fine at a fixed installation like a recharging station, but impractical in a car where size is a premium.
* Capacitors don't work like batteries - as you discharge them the voltage falls straight away, requiring more complex power regulation to give a consistent output voltage. Much easier to do in a fixed installation where size and complexity isn't a problem, but much more challenging in the confines of a car. Li-Ion type batteries maintain a reasonably steady voltage throughout their entire discharge cycle.