This cheap personal fan came with a removable 18650 : r/18650masterrace
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18650 powered fan with onboard charging. : r/18650masterrace
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/product/07/390291/2.jpg?2991 "Shop White Label 18650 Battery For Rechargeable Fan -1800mAh x 4pcs - Blue Online | Jumia Ghana")
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portable 120mm case fan with 18650 battery, charging and boost circuit by Marius | Download free STL model | Printables.com
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Is there any obvious reason why this DIY fan setuo wouldn't work? (More pics and info in comments) : r/diyelectronics
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