These Andromeda MKII's are powered with an internal Samsung 18650 batteries, that can be charged via the included wall adapter or the optional D-Tap cable (to charge via V-Mount). The controller is now built into the light, getting rid of any cables that were tethered to the light itself. Magnets are attached to both sides of the Andromeda's, allowing you to place them on metal surfaces when you are onset.