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Absolutely not!! The adapter turns it from 12v to 3v. Putting clips and going straight to 12v will fry it.
Or buy a female 12v electrical port (cig lighter) with pigtails and attach clips to those. Then plug your cig adapter cord into it. Should cost about $5 to set up.
I took my Frabill battery unit and hard wired it to a male USB connector. I power it on the lake with Dewalt or Milwaukee batteries attached to a USB device that both companies sell. Works great. Can even run it in the car on the way to and from the lake with a cigarette adaptor. Good luck!
I bet it kicks butt at 5v too![/quoteI use a one gallon bucket and have to turn it off once in awhile. The minnows start looking like Richard Simmons if they don't get a rest.