Also for the 7xx series, apparently you missed the whole thread about the dummy Li-Ion battery, where you can run one of those standard 9v wal-mart batts to power the thing for a healthy amount of time.
Um, yes, I did miss that.
Got a link to that discussion? I did a search and all I came up with was a Team 722 thread where Bean posted a link to an ebay auction. Unfortunately, the ebay link is now dead. Any help on how to make up a dummy cell using the walmart batts would be much appreciated.