"A genuinely pocket-sized fan whose 24-hour battery claim is pure marketing fiction."
The '24H Max Cooling Time' claim means the fan can run for a day on its lowest setting, which produces a faint breeze. Expect 2-4 hours of actually useful cooling on the medium/high settings.
This is for someone who prizes pocketability above all else. If you need an ultra-compact, cheap fan for a hot commute or a crowded event and only expect short bursts of relief, it's a viable option.
Anyone needing sustained cooling for a desk, powerful airflow, or quiet operation should look elsewhere. Larger, non-folding fans, even at a similar price, will deliver better performance and durability.