What kind of performance would the Tesla have

[Lauri]

My point was that for passanger car you'd need to have battery capable of no more than 0.5C because you'd like to drive at least 2 hours - that is 110 mile / 180 km range on average cruising speed.

Most batteries are capable of higher burst currents. And you don't need longer bursts than 10 seconds. 10 seconds will get up over the legal speed limit anyway.

Maybe we'll see cars with some supercaps that are able to give boost to the main battery. They'd only have to help for few seconds.

So for my passanger car I see no reason to have battery thats capable of more than 1C discharge. The same thing applies for charging. You just can't get enough power from the power grid to charge batteries with 1C or even 0.5C currents.

So charging max 0.25C and discharging max 0.5C and very high power density - this would be the ideal batt for passanger car in my oppinion.

BTW - I know about the power sag / voltage drop under load. But when talking about C-values one could assume that the battery does handle it without too much voltage drop ;)