Submitted by thwang99 on March 23, 2012
Off topic but just for fun, I was reading about polonium-210, here:
One kilogram of pure 210po will produce 140kW and has a half life of 138 days! So, theoretically, assuming 100% energy efficiency, and no weight of the associated parts, a 1 kg "battery" will produce a TON of power. Assuming just for 138 days, and 140kW, and ignoring the decay after 138 days, that must be a ton of kWH of energy produced, 463680kWh. :)
Would solve range anxiety! Anyways I'm sure I probably got the math all wrong, plus I don't know much about how all this works, just stumbled on that wiki page.