On Jan 28, 5:24 am, G...@MSN.COM wrote:

If I understand you correctly, you're not going to be able to just
"plug in" to your cigarette lighter. Your charger runs on 120 VAC and
your car has a 12 VDC charging system--completely incompatible, which
is where inverters come into play. Furthermore, it is unknown whether
your charger charges the screwgun's battery with DC or, like my
Sonicare toothbrush, by creating a pulsing electromagnetic field
around the base which is then picked up by a coil in the handle and
then rectified (turned into DC) to charge the battery.

I'm also not sure this is the forum for you to ask this question.

-dan

This would only possibly work if your screwgun is a 12V-or-less model.  In most
chargers, the 120V supply is stepped down to whatever the appropriate voltage is
for the battery, which is usually a little more than the rated voltage. Your
car's system ony supplies 12-14V; the actual voltage varies with a lot of
different factors.  If you have a 14V, 18V, or higher screwgun, your car's power
will never charge it without complex electronics to step the voltage up, and in
fact, you'd stand a very good chance of harming the battery.

An inverter may or may not work properly as well - some chargers don't use a
transformer to step the voltage down.