Question about Swaytronic 12V cigarette lighter connector

not at all, depending on the box; it delivers too little starting current for my compressor box

It depends on the power of your cool box, the less power it has, the longer - but the warmer the food. I find the Swaytronic unsuitable for a cool box in everyday use. I would rather use a Goalzero 500x or an electric power source from another brand with similar power. Then it will last for several hours.

with a capacity of approx. 18000mAh and a consumption of 100W, the power bank will be empty after approx. 40 minutes. this is now an estimate, as there are too many unknowns