Battery: 52V 20AH Dual Battery (total 52V 40AH). The Ridstar E Bike Q20 Pro is equipped withdual 1OOOW brushless motors, boasting a combined output of2OOOW. These powerful motors can propel you from 0 to55km/h in just 0-3 seconds, providing twice the power for a maximum speed of 55km/h and effortless45° hill climbing.