Provides enough power despite the small diameter of the cable. They will power and charge my ASUS Zenpad 8 tablet model Z580CA at the same time. Update 05/09/16: The outer sheath of one of the cables has come loose from the end of the USB-C connector and is torn. I used this cable with a 5 port USB extender at home to charge my tablet. I've only had these cables for 4 months and 19 days and this one has already fallen apart. So be careful, they don't seem to last very long. I'm using the second with a 2-port AC travel charger, but it's still together for now. I'm giving it 2 stars because of the quality and durability.