Does the Atom require a power supply? 21 December 2018 13:32 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 Does the Wattbike Pro/Trainer require a power supply? How do I build my Atom? How to connect to the Wattbike Hub App How do I update the firmware on the Atom? Comments 0 comments Article is closed for comments.