Super Long Endurance: The Battery capacity is 4500mAh, and it lasts for 46 hours. Foldable Design and Mini Size: This rechargeable fan can hide the fan blade, small and easy to slide into your pocket and purse. Power Bank Function: A 5V/1A USB output port makes the mini fan a power bank (4500mAh) in an emergency, supplying power for mobile phones. Flashlight: Long press the power button to open the flashlight feature when the fan is not spinning. Safety: The touchable blades, surge and short circuit protection, keep you and your family safe.