THE XM-3500Li IS ABOUT 22% LARGER THAN THE XM-3000 BUT WEIGHS FAR LESS DUE TO THE USE OF LIGHT WEIGHT LITHIUM ION BATTERIES. IT ALSO HAS ABOUT 25% MORE TORQUE THAN THE XM-3000. WITH FRONT AND REAR ABS HYDRAULIC DISK BRAKES THE STOPPING POWER IS BOTH QUICK AND SAFE. THE BATTERY LIFE IS 7-10 YEARS AND CAN BE CHARGED UP TO 2,000 TIMES, WITH PROPER BATTERY CARE. THIS BIKE DOES NOT NEED TO BE RECHARGED DAILY IF THE MAX RANGE IS NOT EXCEEDED.