After traveling 4,500 miles, I have spent less than $5 on electricity. Five dollars! That’s less than a cost of a mocha latte something at Starbucks. That is astounding. That’s less than the cost of two gallons of gas. It means that on days I bike the 10 miles to and from work, I’m spending less than one cent on electricity to get there. And about half the time, I’m carting a bike cargo trailer behind me (often full of groceries) which means it’s a heavier load for the bike to carry.