Portable Rechargeable USB Mini Fan – 3.7V 1800mAh

The Portable Rechargeable USB Mini Fan is a compact, lightweight cooling solution powered by a 3.7V 1800mAh lithium-ion battery with dual speed settings for flexible airflow control. It delivers up to 2 hours of runtime on high speed and 4.5 hours on low speed, with a full charge time of 6–8 hours via standard micro-USB. Ideal for workers in hot environments, outdoor use, or personal cooling during summer heat waves.