A lithium battery fan refers to a portable electric fan that has a built-in rechargeable lithium battery as its primary or backup power source. Its core feature is that it frees users from the constraints of power cords, supporting mobile use.
Core Definition: A lithium battery fan is a movable air-supplying device with a built-in battery (mostly 18650 or 21700 type lithium batteries), driven by a DC motor to rotate the fan blades and circulate air.
Typical Structure:
Uses a rechargeable lithium battery pack (common capacities range from 2000mAh to over 10000mAh);
Supports USB or USB-C charging interfaces, with some supporting use while charging;
Most are equipped with DC brushless motors, featuring low noise, high efficiency, and long life;
Wind speed usually supports multiple levels of adjustment (such as 3 levels or higher), and some products have oscillation, timer, and ambient light functions.
Main Advantages:
Portability: Can be handheld, worn around the neck, clipped, or placed on a desktop, suitable for home, office, outdoor, and various other scenarios;
Battery Life: On medium mode, most products can operate continuously for 6–8 hours, and high-capacity models can last more than 19.5 hours;
Safety: Legitimate products comply with FCC/CE certifications and have protection mechanisms against overcharge, over-discharge, and short circuits.