JZCreater USB Desk Fan, Mini Fan Portable, 3 Speeds Desktop Table Cooling Fan, Plug in Power Fan, Rotation Strong Wind, Quiet Personal Small Fan for Home Desktop Office Travel Bedroom, Apple Green

I have a couple of small 'personal' USB fans in my hurricane box and I occasionally use one to cool a charger if I think it's getting warmer then I like. A million choices on Amazon for around $10 or so. Usually the lowest setting has a very noticeable effect. Here's a couple that I have. https://www.amazon.com/dp/B0CQC5H3YQ https://www.amazon.com/dp/B0BZCVD5G9