I have a short extension for a USB-powered monitor sought to prevent it from blocking the adjacent ports of the charger. Most USB extensions that I have tested in the search, had a relatively large voltage drop - some could even break the voltage by several volts when was even charged with 500mA. This charge transfer problems and problems with USB devices are directly foreseeable. The Delock is one of the few cable that still have a relatively low voltage drop even at 1-2A and is recommended for this purpose very.
