The FNIRSI HS-03 Plus Cordless Soldering Iron is a compact, portable soldering pen designed for electronics repair, PCB work, SMD soldering, DIY projects, and field servicing. It uses a replaceable 18650 lithium-ion battery and can also operate from USB Type-C power, providing both cordless and wired operation. The official FNIRSI specifications list a 10W maximum power, 100–450°C temperature range, 7-second heat-up, and a 0.96-inch IPS HD color display.
| Specification | Details |
|---|---|
| Brand | FNIRSI |
| Model | HS-03 |
| Product Type | Cordless Soldering Iron |
| Battery Type | Replaceable 18650 Li-ion |
| Battery Capacity | 2600mAh |
| Battery Voltage | 3.7V |
| Charging / Working Voltage | 5V |
| Maximum Power | 10W |
| Temperature Range | 100–450°C / 212–842°F |
| Temperature Adjustment | 1°F step |
| Heating Time | Approx. 7 seconds |
| Display | 0.96" IPS HD Color Screen |
| Charging Port | USB Type-C |
| Soldering Tip | F210 Series |
| Tip Types | K, I, IS |
| Auto Sleep | Yes |
| Standby Function | Yes |
| Temperature Control | PID |
| Net Weight | Approx. 134g |
| Operation Mode | Cordless + USB-C Wired |
Specifications are based primarily on FNIRSI's current product documentation.
The HS-03 uses F210-series precision tips. The supplied set includes:
These tip shapes make the soldering iron suitable for both fine SMD work and general electronics repair.
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