strong on the outside (braided cable, obviously well-made connectors), but the internal wiring seems fragile. The power connector flickers on and off when I pick up the device or wiggle the cord, so I can only assume that one of the internal wires is broken. (That's why I needed new cables in the first place.) I've noticed this on a few cables after a few weeks of use. So this is gambling. But the price is low enough to make the game worth it.