Panasonic DVD-LX8 9-Inch LCD Portable DVD Player
Answers I couldn't find from other reviews here
After much research, I was convinced that the Panasonic portable DVD players were the best. More expensive than many but worth the price. Seeing Nemo play on it convinced me and my spouse.  Terrific screen resolution.  I decided I wouldn't use the external speakers or the card slot on the LX9 and the LX8 was otherwise the same unit and cheaper. I haven't been disappointed. We love it. After reading reviews here on the LX8 and the Lx9, I was concerned about the heat discharge if it was in your lap. That has not been a problem. I was especially concerned about the short battery time on the factory battery.  I opted to buy a Lenmar DVDP501 battery pack (6800 mAh)that attaches underneath the unit and does not require carrying along an extra charger. With the combined batteries I get 8 hours of play time at mid-level screen brightness, which is fine. This extra battery was definitely the way to go. Just to test it, I set the brightness at full level and got 6 hours and 40 minutes of play time. The normal 8 hours is plenty for me on any flight. Panasonic is running a special now for a free $29 travel case and a free airplane/car travel adapter), both by rebate. You won't be sorry with this player, if you get the extra battery.