“how long does it take to fully cool when empty using the AC adapter in a house with an ambient temp of 72? We drive 3.5 hours to a cabin and would like to plug this in the night before we leave using the AC adapter then switch over to the cars DC.”

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• We plugged it in at home the morning before we left on our 8 hour trip and it worked great. We also put a couple frozen ice packs inside to help and that worked great. Great investment.

  Answered by Great 8 years ago

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• It takes ours about three hours. If all your food items are cold, then it goes faster.

  Answered by OleO 8 years ago

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