FNIRSI HS-03 Plus Cordless Soldering Iron Kit

A pocket-sized, battery-powered pen iron for jobs where setting up the bench station is overkill: a header that needs re-seating, a lifted wire on a robot, or a repair out in the field. It heats to working temperature in about 7 seconds and holds it there with PID control.

Most portable irons need a power bank on a cable or a butane refill. The HS-03 Plus has a removable 2600mAh 18650 lithium-ion cell inside the handle, so it's truly cordless. When the cell runs low, plug into any USB-C source and keep soldering, or swap in a fresh cell. Because the battery can be replaced, a tired cell doesn't mean a dead tool.

At 10W maximum, it's designed for precision work: small through-hole joints, SMD parts, tinning wires and touch-ups. The F210-series tips use a low-resistance 2.1Ω heater core for quick thermal response on small parts. For large ground planes or heavy-gauge wire, a higher-power iron such as the FNIRSI HS-02A (100W) is a better fit.

Features

• Work anywhere with true cordless operation, powered by a removable 2600mAh 18650 cell
• Never stall on a flat battery: switch to corded USB-C power and keep working
• Start soldering in about 7 seconds with rapid heat-up
• Get consistent joints on sensitive parts thanks to PID temperature control that limits drift under load
• Cover delicate SMD work through to higher-temperature jobs with a 100–450°C range
• Jump between common settings using five quick-select temperature presets, with fine adjustment in 1°F steps
• Extend tip life and save battery with configurable auto-sleep (0.5–60 min) and standby (1–60 min)
• Check temperature, power status and mode at a glance on the 0.96" colour display
• Comfortable for either hand, with left- and right-hand modes that remap the buttons
• Light (about 134 g) with a silicone grip, so longer handheld sessions are less tiring
• Ready for most jobs with three tips included: knife (K), extra-fine (I) and bent fine (IS)

Specifications

What's Included

• 1x HS-03 cordless soldering iron with 2600mAh 18650 battery
• 1x K tip (knife), pre-fitted
• 1x I tip (extra-fine)
• 1x IS tip (bent fine)
• 1x pen cap
• 1x screwdriver
• 1x USB cable
• 1x storage case