This is a cool fan and very light. When I bought it I found that the 18650 7200mAh battery wouldn't last very long. No problem, I thought. I just plug it into my 20,000mAh battery. What I got right is a very short battery life, even with mediocre performance. But my battery pack fits perfectly in the channel in the base. Here's the main problem. does it take forever to finally stop charging literally 5+ hours for 18650? And with the fan turned off. Micro USB is not something they should have gone with. So plug it in and think you can use and charge it. You can. But only on low, slightly higher and it loses battery, let alone gains and shuts down. I can only run it at low levels and it's the same with every type of wall charger I've tried. To make this a good fan I would need to add a USB-C charging module and another 18650. There is a lot of space in the base. But somehow it's not worth the money.
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