Rechargeable fans are compact and convenient, ideal for carrying around. They charge via USB and are ready to use immediately upon plugging in. Some models support power delivery via the phone's OTG function, but this may damage the phone's battery.
Battery life depends on battery capacity and the operating power setting. For example, a 2200mAh battery typically lasts 2-3 hours, a 4000mAh battery provides up to 10 hours, and an 8000mAh battery can last 8 hours at high speed and up to 15 hours at low speed.
Portable fans pose safety risks. Regarding battery safety, some products have simple circuit designs or use counterfeit or bulk lithium batteries, posing a risk of overheating, fire, or explosion in cases of overcharging or short circuits. National testing shows that 17.1% of portable fans failed the external short-circuit test for lithium batteries at room temperature. Regarding mechanical safety, excessively large gaps in the fan grille may allow hair to get caught, causing scalp injuries. Products designed in cartoon toy shapes are likely to attract children, potentially leading to finger injuries from touching the fan blades or accidental swallowing of small parts.
Exporting to the EU requires CE certification (including the Low Voltage Directive (LVD) and Electromagnetic Compatibility Directive (EMC)) and RoHS hazardous substance testing. Products must comply with EN 60335 series safety standards and REACH, POPs, and other chemical substance restriction regulations. Exporting to the US typically requires FCC certification, and e-commerce platforms often require UL certification.
