The Steam Controller’s magnetic charging puck has exposed metal contacts that remain electrically live when plugged in, even if the controller is removed. This design flaw can cause short circuits if conductive metal objects come into contact with the puck, creating fire and shock risks [1, 2].
A Reddit user known as Toikka reported that their metallic smartwatch strap touched the charging puck and "started sizzling due to a short circuit" and "almost started a fire," highlighting the real danger posed by the exposed contacts [1]. Valve’s official Steam Controller manual warns that the magnetic parts may attract metallic objects and cautions users about the risks of sparks, property damage, or injury [1].
Beyond fire hazards, the magnets in the charging puck may interfere with medical devices, credit cards, or magnetic data storage nearby [1]. Similar designs appear in chargers from other companies like the 8BitDo Ultimate 2, which also use always-live pins, raising concerns about widespread safety issues [2].
An enhanced charger design that incorporates a sensing pin to only activate power when the controller is connected could reduce the risk but would increase manufacturing costs [2]. Meanwhile, users are advised to keep the charging puck away from metallic objects or unplug it when not in use to prevent accidents [2].
The new Steam Controller was reviewed in May 2026, drawing attention to its magnetic charging puck design [1]. Reports of short circuits and near-fires like Toikka’s predate that, showing that the hazard emerged early in the product’s release period [1, 2]. Valve has yet to announce any changes or recalls related to this issue.
Users should exercise caution around the charging puck and follow Valve’s safety recommendations to avoid electrical shorts or fire. Further safety updates may be expected if the design flaw results in more incidents.
