i have a rechargable 1 million candle power spotlight seen here http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=42417 i also want to recharge my electric screwdriver and alkline batteries which can be charged through the cigarette lighter of a car, i plan to strip the 120vac adapter wires and clamp them onto a car battery to charge these appliances, heres my questions: does anyone know if it will work?, is it a fire,acid,or shock hazard? Or should i just stay the fuck away from car batteries?

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Originally posted by Mr CrEEP:
Or should i just stay the fuck away from car batteries?

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Well, first off, you should never mess with appliances that shouldn't be powered by car batteries.

Hey pinky, are you quoting from your "Terrorist Handbook?"

Hahahahahahahahaha!
http://www.totse.com/bbs/Forum7/HTML/002246.html

No, I decided I was not going to waste my time with it. It was a stupid idea to begin with. I have better things to do such as program my website.

i ment is that i dont want to connect a appliance through my car cigarette lighter, instead im going to strip the cigarette lighter adapter wire and connect that to directly to a car battery, think it will work?

at first i thought "your on crack, buddy" but now i realize what your saying. im not sure what kinda voltage comes from a cig lighter, so figure that out with a voltage tester first. i doubt its the full 12 volts, more like 5 or 3.5 but i have no idea, maybe it is. if its the full 12, go ahead it should work long as you get your wires right. if not, get a voltage reduction somehow.

Lighters put out 12 volts +/- a volt or so. If you check a battery with a multimeter, don't be concerned if it has around 13 or 14, that's not a big deal.

Stripping the wires and attaching it straight to the battery won't hurt anything, as long as you get the polarity right. Also, remember that you probably need a fuse incase something gets screwed up in whatever you're trying to charge. The cig lighter has a fuse attached, but if you wire your stuff directly to the battery you need to do it yourself.

Shouldnt this be in labratory tips?

what if i over-charge something would it leak or anything?, i would of put this in another topic but i need answeres as soon as i can get them, im goin camping soon

Most batteries that get charged through a lighter don't really have nay way to limit the amount of charge(that I know of). I'm not too sure how it's controleed or even if it is. On the other hand, I've left things hooked up for weeks at a time without any problem.

be fucking careful with car batteries. the acid WILL burn your skin. my advice is to get the 12v AC->DC transformer from any SCALECTRIX kit, or any other mains to DC low-voltage transformers, and try it out with that first.

thanks im thinking of hooking up a power inverter to a car battery, and where can i get a SCALECTRIX kit?

it is quite simple really, the output anywhere on your car is 12 volts DC. The part that goes into the cigarette lighter socket may have a resistor on it, most likely on the positive wire. If you do plan to do this, make sure you leave the resistor in place, as it lowers voltage. 12 volts may overpower your appliance, causing damage.