AC DC

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Hello
Can anyone tell me how to take apart a screw gun type battery
charger, to make it so i can plug it into my car ciggerette lighter? I
know that they make inverters but, this is a pet project.
I have several chargers that i would like to keeo charged
automaticly as i drive from place to place. don't they just "step
Down" the power on the inside any way. 12 volt chargers are rare on e-
bay [and] expensive. What i would like is to have 4 charging all the
time
Any imput ...Thanks

[D.Kreft]

On Jan 28, 5:24 am, wrote:

> Can anyone tell me how to take apart a screw gun type battery
> charger, to make it so i can plug it into my car ciggerette lighter? I
> know that they make inverters but, this is a pet project.

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

[Matt Ion]

wrote:
> Hello
> Can anyone tell me how to take apart a screw gun type battery
> charger, to make it so i can plug it into my car ciggerette lighter? I
> know that they make inverters but, this is a pet project.
> I have several chargers that i would like to keeo charged
> automaticly as i drive from place to place. don't they just "step
> Down" the power on the inside any way. 12 volt chargers are rare on e-
> bay [and] expensive. What i would like is to have 4 charging all the
> time
> Any imput ...Thanks
>

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.