Is it safe to leave my Rubik's Connected charging for a long time? GoCube October 20, 2020 11:42 Updated Yes! There is no problem to leave your cube charging for as long as you’d like. Related articles How long does it take to charge my Rubik's Connected Cube? How do I turn the cube on/off? How do I know how much battery I have left? My Rubik's Connected won't charge or work at all. Battery and Charging Recommendation Comments 0 comments Article is closed for comments.