I have a Bombardier NEV (6 batteries-12volt) or 72 volts. Since I didn't want to bite the bullitt ($1300 for Trojans) I decided to opt for a deep cycle sealed marine marine group 24. The total was $400.00. I get 7 km per charge. This gets me to church or Walmart. Then an 8hr. charge. Its ok for now, but if gas gets to $8/gal. it may be my only means of trans portation. Is lithium in play yet? What gives you the most bang for your buck nowdays?