Nova Tech US via Amazon offers the VoltCube 150-watt Car Power Inverter for $16.95. Coupon code "7WVO436B" cuts the price to $13.56. With free shipping for Prime members, that's the lowest price we could find by $6, although we saw it for a buck less last month. It provides 150 watts of continuous DC to AC conversion, two USB ports, and AC outlets for multi-purpose charging. Deal ends January 15.

You can also purchase the 400-watt version for $27.19 via the above coupon with free shipping. That's a $7 savings.