Bad battery placement
The 4 batteries are put on top of each other, 2 by 2. This makes it really hard to get them in or out. Once I got them in, the fan would not work with the rechargeable batteries even after we tried charging so then I tried regular batteries with the same result. It did work when we plugged it in but obviously that defeats the purpose of using this fan on the stroller, at the pool or beach. Expect more from a fan at the higher end of this market. Ended up finding one we love for less than half the price of this one....
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