I bought a Vado 5.0 SL with a range extender. The advertised range is 120 miles. I got 69 miles before the battery ran down to one remaining bar which had begun to blink. I am checking it again to make certain, but it appears to be an egregious difference between the advertised range and the actual range. My previous Vado 1.0, a much heavier bike, easily achieved 40 miles per charge. I am 76, and weigh 140 pounds. Worse, the Vado 1.0 was very comfortable to pedal on flat with the minimum assistance, eco, which I believe is 30% of capacity. The SL is not as comfortable at fifty per cent capacity, and, oddlly, seems harder to pedal with no assist than the regular Vado. I paid 5,000 dollars to get more range and a bicycle that would get me by with no battery. So far, I am dissatisfied to say the least. By the way, I was given a Rad City to ride, and although it was impossible to pedal with no assist, using only the first of five power levels on flat, I got 80 miles on a charge and pedaled comfortably with level 1, the minimum. I am not happy.