(Set of 8) DC Barrel Jack to USB Power Charging Cable Adapter 8-in-1 Tip Set
And also, you can connect the plugs with the universal 5.5 x 2.1mm DC Barrel Jack. NOTE : The USB cable is only for 5V 2A, not for any Heavy-duty devices, such as Laptop. But you can still connect the plugs to other 5.5 x 2.1mm DC Barrel Jack.