I have a 10 foot USB extension cable on my 2.1ah 5v Apple USB charger for my iPad mini retina. Would using the extension cable have a noticeable impact on charging times or is it inconsequential? If ...

I am looking for a ~ 20 foot USB 3 "Super Speed" extension cable. purpose: to move an external USB HDD drive to the other side of the room. The HDD is powered by its own AC power adapter plugged into ...