The bad news about batteries is that compared to gasoline, they’re almost off the chart in specific energy. Lead-acid batteries, at 0.04 kW-h/kg, are pathetic; in terms of riding range, almost 370 pounds of lead-acid batteries would be needed to match what an engine can do with a gallon of gasoline. It’s only when you get to the latest lithium-ion batteries, a battery type that has only been commercially available for about 15 years, does it get much better, and even then it’s only a matter of degree. It takes 60 lb. of the latest, greatest and most-expensive lithium-ion cells to equal what a gallon (6 lb.) of gasoline can do. And in an actual motorcycle, those cells will have to be encased, protected, monitored by additional electronics and have some attention paid to controlling their temperature. The hardware necessary to do all that will add 10 to 20 percent to the pack weight.