How can I turn on the lights on X-class? May 02, 2020 01:23 Press and hold + button for 3 seconds. Related articles What kind of maintenace should I do on my X-class? Is there a walking mode? Is the battery on X-class removable? My X-class doesn't turn on, what should I do? Can I put D-Class battery on X-Class? Comments 0 comments Please sign in to leave a comment.