CyberPower CPS150CHU 150W Mobile Power Inverter with USB Charger for $17.99 shipped. It is sold by 1saleaday through ebay. Here is a screenshot for your reference. It features built-in surge protection, USB charging port, automatic-shutdown, 2-in-1 connector, built-in splitter, self-retracting 36″ tangle free cord and more. Most places have it for about $37.