DeWalt 20V to MacNaught 18V Battery Adapter (Pump, Grease Gun)
$43.63
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DeWalt 20V to MacNaught 18V Battery Adapter (Pump, Grease Gun)
$43.63
Use your DeWalt 20V MAX batteries on MacNaught 18V cordless tools, without buying into a second battery platform. Built with an injection-molded ABS battery interface, a 3D-printed ABS tool socket for a close fit, and pure copper contacts. It removes the need to keep separate batteries for different platforms, which saves money and simplifies the workflow. It also carries battery protection electronics (BMS) inside.
Specifications
- SKU PTA-DWM20-MNA18
- Fits this battery DeWalt 20V MAX (Lithium-Ion)
- Battery voltage 20V
- Runs these tools MacNaught 18V (Lithium-Ion)
- Tool voltage 18V
- Housing ABS
- Terminals Copper
- Current rating 40A continuous (80A peak at 18VDC for up to 2 seconds)720 Watt continuous at 18V nominal
- Internal wiring 5 mm²
- Weight 109 g (3.8 oz / 0.24 lb)
- Colour Yellow, Black
- Operating humidity 5–95% RH
- Operating temperature -10 °C to 50 °C (14 °F to 122 °F)
- USB port No
- Built-in BMS protection Yes
- What's in the box Battery adapter
- Warranty 12 months after the date of delivery
- Revision Revision 01 (released on December 27, 2025)
Why choose this adapter
- A Battery Management System inside the adapter cuts power before the battery is drained too far — protection your battery may not have on its own.
- Solid copper terminals, so less of the current is lost as heat.
- 5 mm² internal wiring, rated for 40A continuous with 80A peak at 18VDC for up to 2 seconds, so a high-draw tool is not held back by the adapter.
- Covered by a 12-month warranty from the day it arrives.
DeWalt 20V MAX and MacNaught 18V compatibility
It works in one direction only: DeWalt batteries powering MacNaught tools. For the opposite pairing, see adapters that run on MacNaught 18V batteries.
Compatibility can vary with the exact battery and tool model. Before ordering, confirm that your battery belongs to the DeWalt 20V MAX platform and that your tool takes MacNaught 18V batteries.
Important charging and safety information
This adapter is for powering cordless tools and nothing else. It cannot charge DeWalt or MacNaught batteries and must never be connected to a charger of any kind. Always take the battery out of the adapter before charging, and charge it on the original charger made for your DeWalt 20V MAX battery.