Most electric mopeds last for 10 to 40 miles per charge, though travel times are sometimes described in miles- a decent way to calculate times when miles per charge is given is to divide the top speed by the miles per charge given. However, every company lists its traits for you to view prior to purchasing. A safe guess is to assume that you can charge it up every two to three days depending on how often you use it. Keep in mind that charge capacity depends somewhat on road conditions and driver weight. Lighter riders will typically experience longer battery life, and flat, smooth terrain will also provide better battery efficiency.