The edible battery that's too good for electric cars

Here's the problem with electricity: it costs 5 cents to make a kilowatt-hour, but it costs $150 worth of batteries to store a kilowatt-hour. And it's only that cheap if you use lead-acid batteries, which are (a) very heavy; and (b) made with toxic materials.

And that's the rub for electric cars, because the heavier the car is, the more batteries it needs to move. So if you use cheap lead-acid batteries for electric cars, the car weighs two tons, and needs more power, which makes it heavier, so it needs more power, which makes it heavier.