Flashlight ( MOLLE / Picatinny / MagnetiK / Hook )
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Description
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V3.30 Keep track of versions; if you downloaded an old one, I recommend updating.
Hello, friends and non-friends! Winter is coming.
This means it might get more difficult with electricity again—and not just because of the weather. Seeing how plastic "boxes" with a couple of diodes are sold for 300-400 UAH, Maxym and I decided to make our own version—functional, affordable, and easy to assemble.
The flashlight is suitable for civilian use and for those working in field conditions. It features white and red light, USB-C charging, several types of mounts (MOLLE, Picatinny, magnet, hook), and supports various battery types—21700, 18650, or even restored Li-ion/Li-Po cells from disposable devices.
And, of course, if someone really wants to "see the light"—this flashlight can help with that too 😎
💡 Description
This is a 3D-printed tactical flashlight designed for maximum versatility, reliability, and ease of assembly from inexpensive components.
It supports two lighting modes (white / red) using a two-position switch.
It has several mounting options—MOLLE, Picatinny, magnet, or hook.
The body contains an internal wire channel, a USB-C connector with a protective plug, and a compartment for different battery types:
- 🔋 21700 — maximum size and capacity
- 🔋 18650 — via a printed adapter
- 🔋 1S Li-ion / Li-Po from disposable electronic devices (for those who like "second life" for batteries)
⚙️ Main Features
- Two lighting modes: white / red (ON-OFF-ON switch).
- USB-C charging with a dust-proof plug.
- Compatible with multiple battery types: 21700 / 18650 / 1S Li-ion/Li-Po.
- Mounting options: MOLLE, Picatinny, magnet, hook.
- Built-in wire channel.
- Easy to print and assemble — no complex soldering.
📦 List of Components (updated)
| № | Component | Purpose | Link | Estimated Price |
|---|---|---|---|---|
| 1 | 5 mm F5 LEDs (white/red)
| Basic light version — easy to install, economical, suitable for most options. |
| ~1.87 € |
| 1a | Alternative: powerful 1–3 W LEDs (6000K / 4000K / red 660 nm / full spectrum)
| For a brighter flashlight version. Requires an additional heatsink or aluminum substrate, a resistor of appropriate power (1–5 W), and stable power supply. | AliExpress – 50 pcs 1W–3W High Power LEDs | ~3.2 € |
| 2 | KCD11 Switch (3 positions)
| Switches white/red light modes. | AliExpress – KCD11 | ~4.26 € |
| 3 | TP4056 Charging Module with Protection (USB-C, 5V / 1A)
| Charges Li-ion or Li-Po cells (1S, 4.2V). | AliExpress – TP4056 Type-C | ~2.44 € |
| 4 | Magnets with 12 mm x 2 mm hole (3 mm also possible)
| For mounting to metal surfaces. Magnets can also be taken from motors of broken drones; they hold even better.
| AliExpress – Magnets with Hole | ~6.20 € |
| 5 | 47 Ω ±5% Resistor (0.25 W)
| Limits current through 5 mm LED (33–82 Ω depending on brightness). For powerful diodes, 1–2 W resistors with lower resistance (≈2–5 Ω) are needed.  | AliExpress – 47R resistor pack | ~1–2 € / 100 pcs |
| 6 | 21700 / 18650 / Li-ion/Li-Po Batteries
| Power source — various types supported. | — | from 2 € |
🔋 About Batteries
- 21700 — largest capacity and discharge current.
- 18650 — installed via a printed adapter.
- 1S Li-ion / Li-Po — can be used from disposable devices if the cell is working.
- All types must be 1S (3.7 V nominal) — compatible with TP4056.
🖨️ Printing Recommendations
- Material: PETG or ABS for the enclosure.
- Layer height: 0.20 mm
- Perimeters: 3–4
- Infill: 25–35 %
- Supports: not needed.
- Adapters for 18650 or flat Li-Po can be printed separately.
⚡ Electronics
- The switch changes the LED circuit (white ↔ red).
- TP4056 with protection is used only for charging (does not power directly).
A 33–82 Ω resistor regulates LED brightness.
🧠 Safety Notes
- Observe correct polarity (B+ / B–).
- Do not use damaged or swollen cells.
- During charging, the TP4056 may heat up — ensure ventilation.
Do not leave the device unattended during charging.
I DO NOT RECOMMEND VIOLATING THESE RULES BECAUSE THIS IS WHAT CAN HAPPEN!!!
🪫 Copyright Terms
As the author of this model, I prohibit any commercial use without my written consent.
Manufacturing for personal use or free manufacturing for military personnel and volunteers is permitted.
If you wish to produce this item commercially, please contact me for agreement.
In case of detection of sale or publication of the model without the author's consent, a complaint for copyright infringement will be filed.
💬 Acknowledgement
Thanks to Maxym https://x.com/Maxwell255 https://www.facebook.com/maxim.kolnoochenko for assistance with selecting electronic components 💡
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