I love this little thing. I've been using it for a few months to replace a similar fan from another brand and this one is much better. When fully charged, it will run for several hours on the lowest settings. The good thing is that the power cord uses a mini-USB, so it's easy to swap out if it breaks. I carry it in my backpack and with other fans the power cords often break. The battery is protected by a regular battery cover rather than being screwed on like most. It also has a few extra features in ambient lighting and a side flashlight. Why you would need a battery powered fan is beyond me, but these are cool features nonetheless.