How long does it take to charge my Rubik's Connected Cube? Particula Help Center November 18, 2020 12:44 Updated It takes about 2 hours to charge the cube. The blue light LED below the logo on the white face will glow while connected to the charger, even after the battery is full. Related articles My Rubik's Connected won't charge or work at all. Is it safe to leave my Rubik's Connected charging for a long time? I can’t see my Rubik's Connected cube in the pairing screen Battery and Charging Recommendation Rubik's Battery FAQ Comments 0 comments Article is closed for comments.