Review of Mobicool U32 32L 12V & USB Car Cool Box Fridge

This is what looks like the daddy of electric cool boxes, if you’re after a larger car fridge for your vehicle, this could be for you. It can fit the most amount of large 2L drink bottles and chills to 18c below ambient, we review this product to see how it works for us.


Our model came with the USB plug which we have noticed older models have not come with. If you have a USB plug in your car, if it’s newer then you can plug straight in to this as well.

It’s the largest of the electric cool boxes we have tested and also the heaviest. If you are after something that will fit in a full nights worth of drinks or keep food cool for a large family whilst camping, this could be the one for you.

It is much larger than any of the others which means that fitting it in your car may be a struggle, if you can make a gap behind a passenger seat in the rear seats foot well of 40cm wide and 30cm deep, from the back of the passenger seat to the front of the rear seat then you can place this cool box there and still plug it in to your car. We have a small Panda and we could only fit it in this position when no one was sat in the passenger seat. For testing we had it plugged in and sat on the back seats with a belt around it.

mobicool u32 32l usb 12v car cool box electric


The Mobicool 12v and USB Electric Cool Box keeps your food and drink chilled to 18c below ambient temperature outside. The only other which beats this on temperature is the Mobicool U8 8L and that is probably only because it is so small, we think that being 2c off with such a large internal space is a great achievement by this electric cool box.

Once we had it plugged in, it took around 30-45minutes to feel fully cool, or feel as cold as it would get. This was roughly the same for both AC and DC power supply in your home and in your car. This box comes with box the 3 pin UK plug and the 12v car cigarette lighter/USB for car use. These are stored in the top of the box and are hidden away which is great if you are taking the box outside whilst camping and it wont be used or plugged in for a few hours.

This really does a great job at keeping food and drink which could spol cold, it feels the coldest out of any we have tried actually, this is helped by how much the cool box walls are. The downside to this is the noise from the fan and motor when plugged in in your car can be heard, it’s not too loud but there is a definite whirr as it cools the inside of itself. However when you plug this in via a 3pin UK socket, it is virtually silent, so using it on an electric hookup in the UK or abroad with the actual plug being used it should stay silent enough through the night for a good night sleep.


Pros & Cons

  • Large 32L internal space for many food and drink items
  • Really long cable for car use so you can put this anywhere in your car and keep the internals cool
  • Stays cold even when unplugged for hours after, perfect for when using it for picnics and similar events you have driven to with no power supply
  • Actually keeps food and drink cold
  • The fan and motor can make a little noise when in the car, if you have windows open or music on, you probably won’t notice it
  • It is very heavy, weighing 5KG without any items inside, if you are older, maybe getting a trolley would help move it around

Conclusion & where to buy

If you are after a cool box but want to keep things cool for long journeys and camping, this is absolutely perfect. Any food item that needs chilling will be fine in this large car fridge. It does take a while to cool down if it hasn’t been used for a day or two but once cool will stay that way whilst you are driving and will hold it even when unplugged for a few hours when setting up your campsite.

You can fit many large bottles, meals and individual food items in the box as it has a large 32L internal space, so if you have a large family, this is the one for you.

MOBICOOL Mirabelle MM24 DC - 20 LitreElectric Coolbox, blue, 12 V

as of April 16, 2024 5:20 pm


39.5 x 29.5 x 45 cm


Martin Shaw
Martin Shaw

Martin is an automotive enthusiast with a deep passion for all things cars. He has spent the last decade immersing himself in the industry, reading up on the latest models, attending car shows, and tinkering with his own vehicles. Loves: family, all things cars (apart from selling them), pizza.

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