I have heard speculation that you would get much more efficient charging from braking. If not, you need a fire hose at the gas station and perhaps your 220 at home would not do it, at least not in 5 minutes. Overnight maybe.
----------------------- Toshiba will bring the new rechargeable battery to commercial products in 2006. Initial applications will be in the automotive and industrial sectors, where the slim, small-sized battery will deliver large amounts of energy while requiring only a minute to recharge. For example, the battery's advantages in size, weight and safety highly suit it for a role as an alternative power source for hybrid electric vehicles.
http://www.toshiba.co.jp/about/press/2005_03/pr2901.htm
Just to add a little info about fast recharge rate read information on Altair Nanotechnologies ( Symbol ALTI ). They have been working on this for several years now and it's all soon to come to fruition. Recharge my battery drill in a couple of minutes. Wow.