Upgraded to a 36 Volts rechargeable lithium-ion battery increasing the riding time dramatically. Top speed remains at 16 mph but riding time now is more that 4 hours way better that original 40 minutes Don't need it anymore nothing wrong with the bike Cash only This is a pre-owned Razor Rambler 16 electric bike featuring a retro-styled steel frame and wide tires. The item is in good cosmetic condition with minor scuffs consistent with typical operation. Fully functional mini e-bike ideal for recreation.