Good tips here....just logged on to look for an external solution for the JB3. The two internal batteries I have are over 3yrs old with hundred and hundreds of hours on them...they just don't seem to hold a charge as long these days, about 3 hours or so, only.
Been using the 9.6V RC car batteries for two years now with the AD20 and PS2. Has worked flawlessly. Learned how to solder on this project too
So....I think I'm headed out to rat shack right now to get the volt adapter, B plug and a new batt.
Will report back upon completion. Thanks folks!