[dpeterson3]

I don't know about the little Eee for sure, but at least with my laptops, you can't just replace the original battery. There are too many connections the battery feeds. I assume then that you want to plug the battery into the adapter's plug. It is still not a good idea to run a laptop strait from a battery. The power supplies for laptops create smooth uninterrupted power. There will be no glitches and the voltage will be constant. Plugging in a few batteries will not provide the smooth power nor the constant voltage the laptop needs. The short way to say all this is that you really aren't going to just be able to get something off the shelf and make it work. Just a question. Why not bring the power adapter with you to class and sit near an outlet? Maybe an extension cord?