I'm wondering if anyone here has done any battery or tablet load testing for multimedia applications? The two I'd like to do is to test the tablet on the stock battery by itself watching a movie and see how long it can go from full charge until the battery is dead. Then I want to add a 2500mah battery pack to it setup in a charging state while it's running the same test to see how much that improves operating time.

I ask this because I'm looking at taking my tablet and one of the Tekkeon MP1550's with me on a 25hr flight and I plan to watch some movies along the way. Thus I need to figure out usage in order to know what I can watch, for how long, and if I'll need the battery pack plugged in while it's running to keep things alive while I watch the movie. I know I saw a couple people using their n800's that way in another thread, with them watching a movie with the battery pack plugged in while on a long plane trip. So I figured to ask about the n810 to see if the same was true for it as well.