load a 12V battery by the cigarete lighter
I want to make a publicity trailer with led's that will stand at party's (and on the side of the road in the week).
This trailer will stand alone and will be powered by a 12V car battery.
I would like to charge that battery while moving it with my car by a long cable to the 12V socket in the car.
Should I place a resistor to limit the current or is this not necessary?
The trailer is for my youth movement.
(sorry for my bad english)