Portable desk fan

A portable desk fan is a small fan designed to sit on a desk, table, bedside, or small surface. I

Specifications

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