Did you try the
Advanced Search, Hoobash? It works quite well, actually.
Per Nick's comment, I got a solid 3 hrs out of my JB3 at moe. But for the last 30min or so the battery meter was jumping all over the place - empty, full bars, in between.
I have not checked the output of the wall-wart, but a simple test with a multimeter will answer that question for you.
If you're thinking of using a 7.2v RC battery, keep in mind the actual voltage of the RC battery fully charged will be significantly higher than 7.2, closer to 8+. I doubt this will work as the JB3 is rated for 5v and most consumer devices do not have the broad operation voltage range of higher quality prosumer gear. I plan on using 9.6v RC batteries for festivals and wiring a 5v voltage regulator in-line to feed the JB3 the proper 5v external DC.
Quityerbitchin - of course you got moved. This is a power related thread and belongs in the power related forum. This way, people can use the
Advanced Search feature in the future to find this information very easily. Ahem.