If your Oculus Quest 2's red light stays on, the battery is extremely low (10% or below) and requires an immediate charge. Once plugged in, it should become orange until it is completely charged. When the battery is fully charged, the light will be green.  If your Oculus Quest 2 is flashing red light when charging, it could mean a few things. The device may not be receiving enough power when charging, or there's a bad connection with the battery. These problems could be caused by the charging cable or port or the outlet itself malfunctioning and not allowing a proper charge. A damaged battery can also cause issues that drive the light to blink.