Cigarette

I use a breast pump to pump milk for my baby. I will be working at a festival where I have no electricity and I don’t have ready access to my automobile to plug into the cigarette lighter. My husband wants to rig a car cigarette lighter to a car battery somehow so I can plug the equipment in and use it in our tent. Will this work? I called Batteries Plus and they want me to buy a deep cycle battery and inverter instead, but it is REALLY expensive.

If he can build a circuit to limit the amperage, then yes. otherwise the 40 Amps cranking power of a car battery will cook your pump and maybe your breast.
The lighter socket only comes with wires. The circuit will need resistors to set up the circuit properly.

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For example, if I connect my GPS or an FM transmitter to the cigarette lighter to power it, would my car battery drain of power or does it barely make a difference??
PS: I mean, if I use these gadgets while driving and unplug them when I turn my car off.
(I am driving about 1.5 hours per day.)

Also, I never leave anything plugged into the cigarette lighter when I’m not in the car, in fear that my car will get broken into.

If you turn whatever you have plugged in off, it shouldn’t cause a drain. It will if it is left on. How long the battery will last with something draining it depends on what is using the battery power. A GPS doesn’t take a lot of power to run. If you have a good battery in your car, it should last several hours before it pulls it down.

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I am thinking of buying one of the car vacuum cleaners, which can be plugged into the cigarette lighter socket in the car. I would like to know whether this will affect the car battery. Where is the power for this socket coming from? Is it taking directly from the car battery, or if the ignition is on, will it take from the gasoline power?

The battery if the engine is not running, and from the alternator if the engine is running.

Works the same as the headlights or the radio. Don’t worry, it’s not much of a current draw unless your battery is shot or your alternator is defective.

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