The Cmyfato 10-Inch Box Fan solves a specific problem: reliable airflow when you’re far from an outlet or the power goes out. Its 20,000mAh battery is the core of that promise, delivering up to 55 hours on its lowest setting. This isn’t a fan you need to babysit with a cord.

On the highest of its four speeds, it moves a substantial amount of air for its compact size, enough to cool a person or a small room effectively. The 270-degree pivot lets you direct that breeze exactly where it’s needed, from a window sill to a bedside table. A built-in timer can automatically shut it off after 1 to 8 hours, which is practical for overnight use. Charging to full takes about 8 hours via the included USB-C cable.

The USB output port is a clever addition, letting you use the fan as a power bank for a phone in a pinch. Just know that at its top speed, the battery life drops to a few hours, which is expected. For sustained, cordless cooling on medium or low, it’s genuinely hard to beat.