🚀 go-pugleaf

Re: The battery charger, Rick has pointed out that the "thing" is a
selenium rectifier. This is probably true. Since it was built when
that technology was in use, it is probably a 6 volt unit, but MAY
be a 12 volt. You can tell by going to Radio Shack and pick up a
capacitor, something like 20 to 25 microfarrads with a rating at
least 20 volts. Put it across the output of the charger, observing
polarity. You can then measure the voltage built up in the cap.

If around 8 or so DC, then it is a 6 volt charger, if around 16 DC,
then it is a 12 volt charger. Since there is no filtering in the
standard charger, you must smooth the output a bit to tell what you
have.