I talked to a bad boy dealer at the cochon de lait festival in Mansura L.A last year. He said on a full charge you could ride 30 miles wide open on the road. I did a little research and found that in the woods you can cut that in half. Seeing them in a magazine is a lot different than in person. they are impressive. The drawback is the cost of batteries but, the savings on gas might balance it out.
Bad boy faq sheet : Keep in mind it is from 2010 and advancements may have been made
http://rmigolfcarts.wordpress.com/2010/12/03/top-25-faqs-about-bad-boy-buggies/