Battery and electric motor specs needed for an electric vehicle?

I am wanting to build an electric vehicle, but I'm not too familiar with the energy requirements necessary. I would need the vehicle to go about 100 miles on a charge since I commute in and out of the city everyday. If you guys could provide me with some sites about how much battery power you need to go an x... show more I am wanting to build an electric vehicle, but I'm not too familiar with the energy requirements necessary. I would need the vehicle to go about 100 miles on a charge since I commute in and out of the city everyday. If you guys could provide me with some sites about how much battery power you need to go an x amount of distance at an x amount of speed that would be great. I know I wouldn't be buying lead-acid batteries. I'm curious about whether or not someone can just buy hybrid battery replacement packs themselves. Any good battery websites would be awesome, lithium-ion and etc. Thanks.
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