[MrForbes]

We have a few Acer Aspire Ones in our family, and one of the 6 cell batteries, it lasts a while. Not ten hours...but scouting doesn't really happen for ten hours. You can charge batteries during lunch break.

Might go shopping for batteries first, maybe whichever sub $300 netbook has inexpensive high capacity batteries available would be a good choice.

We had fun with the DS scouting thing.