First. I received the device 2 days ago and was trying to figure out how long it would take for it to cool down. The left side is set at 28, the right side at 18. I put a gallon of room temperature water on the large left side. My battery is 300Wh. Everything worked as advertised, but the device lost a lot of cooling and used more battery while trying to maintain temperature. I was hoping to run at least 6 hours on this setting, but the machine kept going and I ended up at around 4 hours. What I've learned from all of this is that if you want something to stay cold, you have to keep up the nutrition. What, as they say. The device performed pretty close to what they said it should have. If it had better insulation I would give five stars.
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