Anker does not make their own USB cords. There are a couple of manufacturers in China that OEM for them and often Belkin has them OEM for them as well. What the manufacturer makes for them and what goes inside the cables depends on what their engineers from both sides agree on. Anything over 3 feet long and performance numbers/levels drop. The longer the more expensive too. Often manufacturers use the shortest cords to quote performance specs or don’t tell you what length they used to get those numbers. A company like Belkin can not use the knock off chipset for usb cable to be MFi compliant with Apple. Because they use the real chipset they have to fork out 3 times more of what a USB cable without the Apple MFi would cost.