Q. Which is better between optima HX OR optima HS500 ER

Among the two, we would suggest you to go with the Hero Electric Optima HX (dual battery). The Optima HX is powered by a couple of 51.2V / 30Ah batteries that work in conjunction with 550-1200 Watts motor. The scooter offers a claimed range of 122 km per charge and has a top speed of 42 km/h. The battery takes 4-5 hours to get fully charged. As for the features, the Optima HX comes equipped with a digital instrument cluster, USB charging port, 12-inch alloy wheels, portable battery, LED headlamp, and anti-theft alarm. Moreover, we would suggest you to take a test ride before making the final decision. Follow the link and select your desired city for dealership details.