A portable desk fan is a small fan designed to sit on a desk, table, bedside, or small surface. I
Specifications
Spec / Feature
Common/Example Value or Description
Power Source
Built‑in rechargeable battery + USB charging (DC 5 V input)
Battery Capacity & Type
4000 mAh lithium battery (≈ 3.7 V) for many rechargeable desktop models.
Charging Input
5 V / 1 A–2 A (USB) for charging; many use standard USB or USB‑C cable.
Power Consumption
Example: ~ 4.5 W for the fan motor on some models.
Wind / Airflow Speed
Multiple speed settings (usually 3 speeds — low / medium / high)
Wind Speed (Airflow)
Example: ~ 4.1 m/s effective wind speed for some models.
Battery Life / Runtime per Charge
- High speed: ~ 3 hours - Medium: ~ 4.5 hours - Low: ~ 6 hours
Charging Time
Typically 3–5 hours (or up to ~ 8 h depending on battery size & charger).
Blades / Fan Design
Usually 3‑blade design, housed in plastic (often ABS) body, for safety and light weight.
Adjustability / Design
Compact/foldable design, sometimes with adjustable head tilt (e.g. up to 105–110°) so you can direct airflow.
Extra Features (optional, varies by model)
- Built‑in LED light (useful as night light or during power‑outage) - Sometimes a “power bank” feature — letting you charge small USB devices when fan is off/charging. - Lightweight and portable, suitable for desk, bedside, travel, office, camping etc. - Low‑noise operation (good for office, study, sleep) — many designed to be “quiet.”
