M&G PRO brand (model size 22 Typical Bike Specifications and Features: Voltage and Battery: Operates on a 60-volt system and usually comes with a lithium battery with a capacity ranging from 15,000 to 20,000 mAh. Motor and Performance: Equipped with a powerful electric motor (dynamo) with a capacity ranging from 800 to 1000 watts to provide excellent city driving speed.