> to, you'd be able to put together your own 4.5 to 6V pack using
> slightly less tiny button cells, for significantly better capacity
> at your desired voltage...

It's funny, when you mentioned this it jogged loose in my memory a site 
I recently visited that described doing precisely this, ironically with 
the exact 12V  remote battery that prompted my original question:

http://members.cox.net/berniekm/battery.html

It's clever how he used a couple of washers and some heat shrink tubing 
to make his own custom battery pack, just as you suggest.

Thanks,

  --Steve.

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