18V–20V to 12V Step-Down Converter | Makita Milwaukee Bosch
18V–20V to 12V Step-Down Converter | Makita Milwaukee Bosch
18V–20V to 12V Step-Down Power Adapter for Makita, Milwaukee, Bosch & Craftsman Batteries
Turn your existing 18V or 20V lithium-ion power tool battery into a dependable 12V DC power source for automotive accessories and outdoor devices. This adjustable step-down voltage converter is engineered for Makita, Milwaukee, Bosch, and Craftsman battery platforms, delivering up to 10A of steady output current at ≥95% efficiency — all without the need for a vehicle engine running.
Made in Mainland China.
Key Specifications
- Input Voltage: DC 18V – 20V
- Output Voltage: DC 12V (fixed) / DC 5V–13V (adjustable)
- Max Output Current: 10A
- Efficiency: ≥ 95%
- Output Interface: Cigarette lighter socket (12V standard)
- Wire Gauge: 16 AWG
- Housing Material: Fireproof PC+ABS
Wide Battery Compatibility
- Milwaukee 18V: 48-11-1820, 48-11-1828, 48-11-1835, 48-11-1840, 48-11-1850, 48-11-1852, 48-11-1860, 48-11-1862, 48-11-1865, 48-11-1880 and more
- Makita 18V: BL1820, BL1820B, BL1815B, BL1835, BL1840B, BL1845, BL1845B, BL1830B, BL1850B, BL1860, LXT-400, 194205-3, 194204-5 and more
- Bosch 18V GPA: BAT607, BAT607G, BAT609, BAT609G, BAT614, BAT614G, BAT618, BAT618G, BAT622 and more
- Craftsman V20 (20V MAX): CMCB201, CMCB202, CMCB202-2, CMCB204, CMCB204-2, CMCB204-OPE, CMCB209 and more
Why Choose This Step-Down Converter?
- Multi-Layer Circuit Protection: Built-in over-current, short-circuit, over-load, no-load auto power-off, and low-voltage protection keeps both battery and connected devices safe.
- Convenient Cigarette Lighter Output: Plug-and-play 12V socket lets you connect car appliances — tire inflators, coolers, dash cams, LED light bars — instantly with no complicated wiring.
- High-Quality, Fire-Resistant Build: Fireproof PC+ABS shell, 16 AWG copper wires, and an efficient internal cooling design ensure long-term durability under regular and demanding use.
- Snug, Tool-Free Fit: Precision-engineered battery connector seats firmly on your battery pack and releases easily — no tools required.
- Versatile Use Cases: Camping, tailgating, off-grid worksites, roadside emergencies, and any situation where a 12V power source is needed without access to a vehicle or wall outlet.
Package Contents
- 1 × 18V–20V to 12V Step-Down Converter (battery not included)
For more information on electrical safety standards for power conversion devices, visit the U.S. Consumer Product Safety Commission (CPSC).
Frequently Asked Questions
Q: Which battery brands and models are compatible with this 18V to 12V step-down converter?
A: This step-down converter is compatible with 18V/20V lithium-ion batteries from Milwaukee (M18 series such as 48-11-1850), Makita (18V LXT series such as BL1850B), Bosch (18V GPA series such as BAT609), and Craftsman (V20 MAX series such as CMCB204). Please check the full model list in the compatibility section above to confirm your specific battery model.
Q: What devices can I power with this step-down converter?
A: The 12V cigarette lighter output lets you power any standard 12V car accessory — including portable tire inflators, 12V coolers and refrigerators, LED work lights, dash cameras, air compressors, and more — directly from your power tool battery, making it ideal for job sites, camping trips, and outdoor activities.
Q: Is there any protection against short circuits or overcurrent?
A: Yes. The converter features built-in multi-layer protection including over-current protection, short-circuit protection, over-load protection, automatic no-load power-off, and low-voltage cut-off to safeguard both your battery and your connected devices during operation.
Q: Does this converter include a battery?
A: No. The package includes only the step-down converter adapter unit. Batteries (Makita, Milwaukee, Bosch, or Craftsman) must be purchased separately and are not included.
Q: Can I use this converter with both 18V and 20V batteries?
A: Yes. The input voltage range is DC 18V–20V, so it works seamlessly with both 18V tool batteries (Makita, Milwaukee, Bosch) and 20V MAX batteries (Craftsman), converting the input down to a stable 12V DC output.