Smartele Battery Operate Fan Leading Superiority 2.5H Fast Charging & Running up to 38H Smartele battery operate fan is equipped with an advanced fast charging module which is charged up by a 12500mAh lithium-ion battery. Only 2.5 hours can be fully charged. 3-38 hours of using time! The battery operating fan can keep you cool the whole day. Pure Copper Brushless DC Motor Smartele battery operated fan blades are made of 5pcs AS blades and the material of the motor is pure copper brushless, which has good electrical conductivity and improves motor efficiency. The motor‘s service life can reach 10 years. Use as an Emergency Power Bank Smartele battery fan can also use as an emergency power bank in hurricane season caused by its large battery capacity. Especially in the event of emergency charging needs, which can be charged to cell phones and other electronic devices. No more worrying about your phone being out of battery. Ideal For Outdoor Use This portable floor fan has an IPX4 waterproof structure that can protect against inclement weather, such as sudden rain when working or camping outdoor. To a certain extent, mosquitoes can be sway away. It helps you keep cool the whole day which is a good travel companion. Good Helper For Interior Decoration Smartele portable cordless floor fan has variable speed control and an adjustable 160°tilt head, you can control the fan speed. It offers a max of 2500 CFM airflow thanks to its 5pcs AS blades. It's great for drying painted walls and drawing out the odor. Lightweight & Durable The portable battery fan is lightweight but durable. It can be used in your camping trailer without taking up too much space. It is equipped with a metal frame and anti-slip rubber feet. The portable battery fan has the ability to withstand dropping shocks and run normally in terrible environments.