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Cooling a 18650 Lithium Ion battery charger with an Aliexpress recargeable miniature fan
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This charger for 18650 Li-Ion batteries, which is used for my Aliexpress 365nm LED flashlight, considerably heating during charging, so I bought an Aliexpress recargeable miniature fan to cool it.
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So I uses this fan to cool it, and it indeed not heating anymore when the fan cooling it.