eWINNER USB to DC 9V Step Up Power Cable, 5V USB-A Male to 5.5 x 2.1mm DC Plug, 1m Boost Converter Cord for Routers, Speakers and Lamps, Black - ZE-GQZN-ZEHO

Run your 9V gadgets from a power bank or any 5V USB port with the eWINNER USB to DC 9V step-up power cable. A built-in boost converter in the cable lifts a 5V USB-A supply to a steady 9V output at up to 1A, delivered through a standard 5.5 x 2.1mm DC barrel plug. It is a practical travel and outdoor solution for wireless routers, Bluetooth audio, speakers, fans and table lamps, so you no longer need to carry a bulky mains adapter. The converter includes reverse polarity, over-current, over-temperature and short-circuit protection to help guard both the cable and your device. The 1m (3ft) black cable is light and easy to coil into a bag. For reliable operation, feed it from a 5V source rated 2A to 4A and check that your device uses a 5.5 x 2.1mm jack with a centre-positive input.