Ah but the battery box is designed to take the molded HP battery unit,
which plugged into the back, rotated down and latched into the top (see
<http://www.home.mcmanis.com/hp21-back.jpg> for a picture. Since it would
be "impossible" to connect it backwards its possible the HP engineers
dismissed that possibility and said fine this will never come up.
--Chuck
At 08:22 PM 5/5/01 -0500, you wrote:
In reverse shouldn't hurt it, just as if you put AA
cells in a radio and
they were backwards. Transistorized equipment is polarized to work so my
guess is that it wouldn't hurt it. Charging them backwards might though.