I insist on being able to recharge my batteries without removing them. I am looking for a 7.2V battery pack to power my saber which will run an UltraSound2.1 and a blue P4 (possibly changing to a LuxV if I think it warrants it). It’s my understanding that the packs Tim sold were 4.8V, so I’m going to need to go outside the shop for this. I’m an RC guy (when the economy was good), so I first checked Tower Hobbies to see what they had to offer that would fit inside the hilt. The bulky car and truck batteries are out, but they do sell some pretty small aircraft and heli packs that may work. They fit, but the problem is the mAh rating on these is 500 or less—which doesn’t spell long run times.

Here’s what I’m talking about:
http://www3.towerhobbies.com/cgi-bin...?&I=LXVJE4&P=0
http://www3.towerhobbies.com/cgi-bin...?&I=LXGBL6&P=0

Do you guys see anything else that would work better? Will a 7.4V pack work (there are a lot more of them)? Where should I go?