No memory effect. There are tons of them out there. When the flaps are opened, polypropylene handles allow for quick and easy removal and carrying. If you pedal, you can go faster. The motors are powered in series to achieve 10 mph and in parallel to get 18 mph.
Total range is dependent on terrain and rider input through pedaling.
Generally, you can count on 10 miles in the fast speed. Charges in three hours or less. Costs about 5 cents per charge. Three hours of charging uses 468 watt-hours or 0.468 Kwh. This is the same charger ZAP sells for 30.00 less.