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just to give you a idea of what you are looking at, my 1,400 pound electric car draws around 6,000 watts cruising at 35mph on a flat road, 12,000 - 15,000 going up hills at 25mph, and up to 20,000 for a few seconda while starting from a dead stop and 25,000 watts going up my 300 foot long driveway, all of this in a 1,400 pound car with 500 pounds of lead acid batteries.
you don' need alot of range out of the battery, but you do need one large enough that it can handle the draw, I would almost say that normal car batteries are going to be the way to go, as they are going to get charged right back up after you use the burst of energy, 500 cold cranking amps would give you about 6,000 watts, and if you had ten of them that is 60,000 watts of avalible power.
but I personnely think you are better off moving or changing jobs if you spend $350 a month on gas.
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