Best Cigar Lighter Should I Put A Toggle Switch On My Cigar Lighter Plugs?

Should i put a toggle switch on my cigar lighter plugs? - best cigar lighter

In the construction of a dual-output cigarette lighter plug for accessories in the car. Stop the car. I wire by 2 percentage points of the sale of cigarettes and attached in parallel to each other. The go into the hands of the battery cable so all his time. Constant power. No inflammation.

QUESTION
I should be a toggle switch on them? Some are selling well and others do not.


Thanks

And
How big is the IC to use?
I have a 25 in due course.