Currently using Sealed Lead Acid. Full power straight away 8-10 miles, stop and go utility use 12-15. Customers have reported more. Why do we use Sealed lead Acid, Price. We can offer Nickel Metal Hydride (used in Prius) as an option, approximately 65% greater range, 4X battery life, can handle faster charge if you have the power to supply a larger charger. Lithium will be next.