... oh, there's gotta be a way... one of those TI voltage regulators wired into the brass screw on cap or something. Mayhap a resistor of xxx ohms... Modders do that stuff to nicosticks and such to step down voltage. I thought of making a disk with a resistor in the middle, contacting the batt on one side with the spring contacting the other with the ends of the resistor soldered one to the top and one to the bottom with supports around it- wouldn't have to be very wide and there's enough play to permit it. For all I know you could use a voltage regulator in the same way. Just tossing this out to see if any of the creative peeps out there that know a heckuva lot more than I do (to boot, a blind man could solder better than me). To think of it, a kid that's taken even an elementary electrical class would know more than me, so if you're reading this, you probably do... any thoughts?