Batteries

[FotoPlasma]

Originally Posted by sanddrag

As for the issue of starting a car, it is possible to do with a FIRST robot style battery. http://www.harborfreight.com/cpi/cta...emnumber=39954 I have one of these things and you can jumpstart a car at least 4 times before it doesn't have enough power to do it again. Also, what about those things you plug into the cigarette lighter to jump a car. How do they work and what batteries do they have?

As far as I know (and beware, I am no expert), the cigarette lighter circuit is connected, via the ignition system (as a switch), to the positive and negative leads on the car's battery. On most cars I've had the privelidge to replace a fuse in, the cigarette lighter circuit is fused at 10Amps, but I think most cigarette ligher male plugs have integral 3Amp fuses. As long as there's enough limiting resistance, the car needing the jump will be charged safely.

This is just what seems to me to be going on. I've never done it and, until now, haven't really been familiar with the practice. If I'm wrong, please correct me.