Flashlight Driver Board 17/20mm 6-15W LED 18650 Battery DIY
Flashlight Driver Board 17/20mm 6-15W LED 18650 Battery DIY
Flashlight Driver Board – 17mm & 20mm | 6–15W LED | 18650 Battery Compatible
Upgrade or build your own high-power flashlight with this compact, reliable LED driver board. Designed for DIY enthusiasts and electronics hobbyists, this single-gear driver board delivers a stable 1.8–2.3A output current to power 6–15W LED beads — all from a single 18650 lithium battery. Available in two sizes: 17mm (red) and 20mm (blue) to fit the most common flashlight tube diameters.
Made in Mainland China.
Key Features
- Wide LED Compatibility: Supports 6–15W (3V) LED bulbs, ideal for a broad range of DIY flashlight builds.
- 18650 Battery Ready: Input voltage of DC 3.7–4.2V — perfectly matched to a single 18650 lithium cell.
- Stable Current Output: Delivers 1.8–2.3A for consistent, flicker-free performance from high-power LEDs.
- Compact Mini Board Design: Ultra-small form factor fits neatly inside standard flashlight housings without modification.
- Simplified Single-Gear Circuit: One-step drive design reduces circuit complexity and improves long-term reliability.
- Two Size Options: 17mm diameter (red board) and 20mm diameter (blue board) for mainstream flashlight tubes.
Specifications
| Gear | 1st Gear (Single Mode) |
| Input Voltage | DC 3.7–4.2V (1× 18650 battery) |
| Output Voltage | DC 3.0–3.3V |
| Output Current | 1.8–2.3A |
| Applicable LED Power | 6–15W (3V LEDs) |
| Board Diameter | 17mm (red) / 20mm (blue) |
| Compatible Battery | 18650 Lithium Battery |
Package Contents
- 1× Flashlight Driver Board (choose 17mm or 20mm)
Notes
- Colors may vary slightly from product images due to screen and lighting differences.
- Please allow 1mm–1cm tolerance due to manual measurement.
- Ensure your selected LED bead operates at 3V and falls within the 6–15W power range for best compatibility.
For general electrical safety guidance on DIY electronics projects, visit the U.S. Consumer Product Safety Commission (CPSC).
Learn more: Printed circuit board
Frequently Asked Questions
Q: What size flashlight driver board should I choose — 17mm or 20mm?
A: Choose based on the inner diameter of your flashlight tube. The 17mm red board suits smaller flashlight housings, while the 20mm blue board fits larger, more common tube diameters. Measure your flashlight's driver cavity before ordering.
Q: Is this flashlight driver board compatible with all 18650 batteries?
A: Yes — the board accepts an input voltage of DC 3.7–4.2V, which matches the standard charge range of most 18650 lithium-ion batteries, making it an ideal single-cell DIY flashlight driver solution.
Q: What LED wattage works best with this driver board?
A: This driver board is optimized for 6W to 15W LED beads rated at 3V. Using LEDs within this power range ensures stable current delivery and reliable long-term performance. Do not exceed 15W to avoid overloading the board.
Q: Can I use this board in a multi-mode flashlight build?
A: This is a single-gear (1-mode) driver board, meaning it operates at one constant output level. It is best suited for simple, always-on flashlight builds. For multi-mode builds requiring high/medium/low settings, a multi-mode driver board would be required.