Mark & Juanita wrote:


I believe the OP indicated this was a 9V battery. Still, the trade
between protecting against catastrophic damage in what is a highly likely
event (reversed polarity applied) and having to deal with the voltage drop
to protect against that event seems to come down very heavily on the
protection side.

If you're gonna be dumb, you better be tough

+--------------------------------------------------------------------------------+
yup. 9V.

Dave