Awesome Service via Amazon offers Prime members the Cyberpower 160-watt Mobile Power Inverter, model no. CPS160SU, for $9.13 with free shipping. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $5.74.) That's a buck below our June mention and the lowest total price we've seen. (It's a current low by $35.) This device converts 12-volt DC automobile power to 120-volt AC home power. It features a USB port, surge protection, 2-in-1 auto/airline adapter, and automatic shut-off.