I have 3 of them - a Sears, a Harbor Freight Jumppak w/compressor, and a Coleman. I use the Coleman most often because it has a screwon end and it pumps the tire up faster. The Sears and Coleman both are lighter socket plug-in units, the Jumppak has its own battery, but, its clamp on end is hard to use. The nice thing about the Coleman is that it can do either high pressure for tires, and, low pressure, high volume for air mattresses, beach toys, etc. Neither the Sears or the Coleman have a built-in light, so, I carry flashlights in the cars as well.
Regards:
Oldengineer