I bought a RCA model DECK18 from Amazon. It has two power cords, one for 110v with a "brick" and a second cord with a cigarette plug for 12v use - no brick. It has a built -in DVD player. I think wiring a 12v outlet directly to the batteries is more efficient than using an inverter when running on battery power only. Here is the product description:
Product Description
The RCA 18.5" LED TV/DVD combo serves multi-purposes with features for video games, PC monitor and HDTV and its AC/DC operation allows you to be able to watch your favorite TV programs and DVD movies in the car, boat, or truck. Watch your favorite DTV channels with built-in ATSC tuner whether over-the-air broadcasts or cable/satellite service. HDMI combines uncompressed digital audio and video signals into a single cable for high-definition sources. Various types of inputs allow you easy connection to your devices such as a PC or a video game console. You can even watch your favorite DVDs with the built-in DVD player.