You can successfully use these cables with a lower input current, providing that the supplied input power to the Power Pipe meets (or exceeds) the power requirements of your setup. Some basic calculation is required. (in this simplified scenario) Max Output power = 12v *max output current of your power supply @12v For example, If you had a power bank with a PD rating that says 12v,2a max, then your max power would be 24watts (24w= 12v*2a) You then need to check this exceeds the power requirement of your device, the device product manual or label should make the input requirement clear.