I purchased the 1ft cables for 1 reason, charge time, or voltage drop. In comparison to my 6 ft cable, my phone will charge in 1/2 to 1/3 the time, particularly when using a computer to charge the phone. When I use a wall, or car adapter it is not quite 1/3 charge time, more like 2/3 to 1/2 the charge time. Technical Details: With the 1 ft cable, the current has to travel 2 ft, 1 ft to the device, and 1 ft back + distance through the phone. With the larger than standard gauge wire, 22 AWG, it is 0.016 ohms per ft, if I am driving 2 Amps, that is a total voltage drop across the wire of 0.064 V, which means that with a 5 V supply, I am able to deliver 9.872 Watts to the device. On the other hand, for some other cables I own, they are 6 ft long, and 24 AWG, so a smaller wire diameter. If I were to run 2 amps across that wire, which has a total of 0.308 ohms of resistance, then I would have a 0.616 V drop, and see 4.384 V at the device, so 8.768 W. Likewise, the length with affect the inductance and capacitance of the cables. Since phones typically use pulses to charge them, in order to prevent over-charging, you encounter a wave more closely resembling a square wave. Since there is no such thing as a true square wave in real life, due to inductance and capacitance, you would see more of an exponential signal to a DC voltage, then an exponential drop off when the voltage is shut off. This too will become more exaggerated if the cable is longer, causing the signal to more resemble a sinusoidal signal. Since the increased resistance would actually cause the device to see less current as well, because the impedance would essentially slow the flow, the numbers in reality are different. It is sufficient to say that I have seen charge times of approximately 1/2 to 1/3 of what they were previously. As mentioned before, I noticed a significant difference when using a computer to charge the device, and not as significant of a difference when using a wall mounted power supply. The difference is likely due to the power supplies and their supply voltage, the wall supply may compensate for the voltage drop, or run at 0.25 V higher or so, I have not conducted tests on that yet.