Panasonic DVD-LA95 9-Inch Portable DVD Player
Excellent product
I purchased this product primarily for use by my 4-year-old daughter so she can stay occupied when we take long flights.  I have only used it for one such case so far, in which we flew to Mexico from Seattle, but I was very impressed at Panasonic's execution with this DVD player.  (Note that there is a newer unit, the DVD-LX9, available from Panasonic that has progressive scanning technology and stand-alone speakers, but it is also significantly more expensive and probably not worth it given the typical use cases of a portable DVD player.)  The LA95 basically does everything right.  For example, it has good sound quality and a more than sufficient amplifier so both the external speakers and headphones actually work reasonably.  (Most portable devices have lousy external speakers and some even suffer from poor volume level even with headphones.)  It also has a very clean picture and I saw no instances of pixelation or other bad DVD processing artifacts as I played with the forward and reverse controls.  The best thing, though, was the optional extended life battery (the CGP-H501A).  It lasts for up to 10 hours of DVD play:  on one charge, we flew to Mexico and back, playing multiple movies in both directions, and I used it to watch two movies while in Mexico, and the battery pack is not all that heavy or obtrusive.  If you're looking for a very strong portable DVD player, you will definitely not be disappointed if you purchase the DVD-LA95.  Just be sure to purchase the extended life battery (there is an H502 also, but that has a *lower* life than the H501 - get the H501) and you might want to pick up a headphone jack splitter so you can have more than one person listen in with headphones.