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 Can I change the saddle on the Atom? Can I change the pedals on the Wattbike Atom? What are the dimensions of the Atom? Atom User Guide How much maintenance does the Atom require? Comments 0 comments Article is closed for comments.