I was looking for something else and stumbled on this. A AA size 14500 battery with tabs. Tadiran AA 3.6V Lithium Battery, w/Tabs. I thought this would be perfect for building in something other than a battery case. Some of the ideas I've come up with are containers that don't have a ready to install batteries. This would solve that problem as I could solder my wired directly to the battery. According to the description it 3.6V 2100mAh Lithium. They don't say it's protected, but that's easily solved with a PCB from here. They have a few other sized of batteries with tabs there as well. I can finally rebuild that battery for my cordless drill as well. While I'm at it, I just might hook up a atty to the back end of my drill. 