Penjamin Mini Rechargeable Soldering Iron Pen
- Wattage: 510 watts
- Upper Temperature Rating: 572 °F
- Head Style: Pencil
- Power Source: Battery
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A pocketable backup iron for light, occasional fixes on the go, not a substitute for a mains powered station.
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ASIN: B0FZXN68BGCategory: Soldering Irons
Overview
The Penjamin is a pocket sized soldering pen that charges and runs off its own rechargeable battery through a built in USB-C cable, with voltage adjustable from 1.5V to 4.2V and an LED screen showing voltage and battery level.
Instead of a temperature dial in Celsius or Fahrenheit, output here is set by voltage, closer to how a hobby battery pack is controlled than a bench iron. That trades precision for size: the whole thing is meant to plug into a phone charger or power bank rather than a wall outlet.
- Built in USB-C rechargeable battery
- Adjustable output, 1.5V to 4.2V
- LED voltage and battery level display
- Removable threaded tip
Who it's for
Someone who wants a small backup iron for travel repairs, glasses, small gadgets, or quick fixes away from a bench, not a person doing regular board level work.
Pros and cons
- Small enough for a pocket or travel bag
- Charges from a phone charger or power bank over USB-C
- LED screen shows voltage and battery level while in use
- Quick heat button for a faster start
- Voltage based control (1.5V to 4.2V) is less precise than a direct F or C readout
- Tip is removable and threaded, so replacement tip compatibility is worth confirming before relying on it
Performance notes
Output is set on a 1.5V to 4.2V scale rather than a direct temperature readout, with the color LED screen showing the current voltage and remaining battery charge as you work. A quick heat button is meant to bring the removable tip up to working heat faster than waiting on the base setting.
Specifications
| Brand | Penjamin |
|---|---|
| Dimensions & fit | |
| Item Weight | 0.07 pounds |
| Item Length | 2.3 inches |
| Capacity & performance | |
| Upper Temperature Rating | 572 °F |
| Power & efficiency | |
| Wattage | 510 watts |
| Power Source | Battery |
| Included components | |
| Included Components | Soldering Iron Tips |
| Other details | |
| Head Style | Pencil |
| Number Of Items | 1 |
| Additional Features | Lightweight, Portable, Rechargeable |
| Specific Uses For Product | Jewelry Soldering, Residential Use |
| Style Name | Pencil |
Frequently asked questions
How is temperature controlled on the Penjamin soldering pen?
Output is set by voltage, adjustable from 1.5V to 4.2V, rather than a direct Fahrenheit or Celsius readout.
How do you charge the Penjamin soldering iron?
It has a built in USB-C cable that plugs into a phone charger or power bank to recharge the internal battery.
Can the tip on the Penjamin iron be replaced?
Yes, it uses a removable threaded tip that can be swapped out.