Does the Atom require a power supply? November 11, 2019 15:30 Updated Yes. The Atom requires a mains power adapter when in use, a 12v, 2A DC power supply is supplied with the bike. Related articles How do I build my Atom? Does the Wattbike Pro/Trainer require a power supply? How to connect to the Wattbike Hub App How do I update the firmware on the Atom? How do I build my next generation Wattbike Atom? Comments 0 comments Article is closed for comments.