On Thu, 9 Apr 2015 01:38:41 -0700 (PDT), robobass
wrote:

When the family makes a road trip I bring along a 12v 4 amp cooler. The ciggie plug melted long ago and I wired up one of those 3/16" cannon shaped connectors used for low voltage home stuff like laptops, external HDs etc. It also gets very hot and is starting to melt. What's a good off-the-shelf solution which doesn't take up much room? The whole ciggie plug thing is the dumbest convention ever, I must say. I can't believe it's still extant.
Small "anderson" type plugs.. Use one rated for at least twice your
anticipated current - IE - a 10 amp minimum to run the 4 amp cooler.