True....I don't think it's wise to watch movies with iPod touch, little screen.
Archos 605, as u stats, it only does video, but PSP is the right product for those who like to play games and watch movies
on a handheld device and occasionally listen to music or surf the
Internet. Bet u can spend a nice time on the plane with PSP, and it's also with large capacity, 32MB / Video Memory - 2MB EDRAM.
Not sure whether it can last 10 hours for movie watching, but listening to music can hold about 10 hours. well, here is a nice review u may wanna have a look. Hope it would help. XD
http://www.avecmobile.com/index.php?id=642
"The battery lasts about 4-5 hours when playing games that are not using
the Wi-Fi connection. Listening to music drains the battery in about 10
hours and you can watch 2 feature-length movies at one charge."