Review on 🔌 K-box Electric Cooler Warmer Wheels Car Home - 48 Quart (45 Liter) - Extended 6 FT. Long Cables Dual 110V AC House 12V DC Vehicle Plugs (Grey White Blue) by Neil Bodell

My old Coleman is over 20 years old and still works after driving over 100,000 miles and many thousands of hours of off-vehicle use but seems to be getting old so I got a new Coleman and a K -Box purchased (K-Box looks the same as Knox.) Coleman and K-Box look and measure the same inside and out, despite K-Box's claim of "48" quarts and Coleman's "40" quarts. them empty, in my basement at 64 degrees F overnight and a thermometer installed below, Coleman dropped to 19 F and drew 76 watts from the old 12v adapter (which lost 5 watts after a few hours of use); The K-Box was cooled to 32F using 72 watts on an old 12v adapter which dropped to 59 watts after a few hours of use (the 12v adapter draws power that would not be used when plugged into the vehicle would). - The box started at 65w with mains lead and dropped to 50w after a few hours.) The K-box doesn't say it stops cooling at 32F - maybe it's a design feature - but it doesn't seem to be about the power have to cool off. (My 20-year-old Coleman, which cools noticeably worse than when it was new, is still running, so I let it run: it dropped to 32F idle at 66F in air at 55 watts.) I put them out on the road pre-cooled The shading. at 70 F rises to 90+ F: Temperature rose to 53 F in the K-Box after 4 hours connection; next to him in the Coleman it was 7 to 11 degrees Fahrenheit colder. (Example: 70F outdoors, 50% RH, 43F K-Box, 32F Coleman; evening chilled to 65F outdoors, 54% RH, 36F K-Box, 25F Coleman.) Start unplugged at Room temperature temperature, work side by side, Coleman cools more. For example, morning, 64 F, humidity 62% (elevation 300 feet), both cool down to 45 F after 1 hour, after another 30 minutes (air 66 F, 59%), K-Box = 40 F, Coleman = 39 F 30 minutes later (air 70 F, 57%), K box = 37 F, Coleman = 35 F. 30 minutes later (air 78 F, 52%), K box 39 F, Coleman 34 F. 30 minutes later ( Air 81 F, 43%), K-Box = 43 F, Coleman = 35 F. 30 minutes later (Air 84 F, 35%), K-Box = 45 F, Coleman = 38 F. 30 minutes later, ( Air 86 F, 33%), K-Box = 47 F, Coleman = 40 F. 30 minutes later (Air 87 F, 32%), K-Box = 49 F, Coleman = 42 F. 30 minutes later (Air 88 F, 31%), K-Box = 50 F, Coleman = 44 F. The heat exchanger in the K-Box is too small for the heat input of its compartment. I would use the K-Box if it was 20% larger and had a 30% larger heat exchanger: it gets 3 stars as it is. Coleman gets 5 stars. The K-Box lid is a lot heavier because its mechanism is there; The Coleman is on the side so you don't have to pick it up every time you open the lid. The Coleman cap lifts with a force of 6 ounces; K-Box requires 1.5 pounds of force; Coleman's design is better.