RIDGID 18V to MacNaught 18V Battery Adapter (Pump, Grease Gun)

Use your RIDGID 18V batteries on MacNaught 18V cordless tools, without buying into a second battery platform. Power passes straight through: RIDGID 18V and MacNaught 18V share the same 18V rating. Injection-molded ABS on the battery side, precision 3D-printed ABS on the tool side, and pure copper contacts for steady current delivery. A practical way to extend the value of the RIDGID 18V batteries you already have. It also carries battery protection electronics (BMS) inside.

Specifications

• SKU PTA-RID18-MNA18
• Fits this battery RIDGID 18V (Lithium-Ion) from Home Depot
• Battery voltage 18V
• 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 121 g (4.3 oz / 0.27 lb)
• Colour Orange, 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 February 15, 2026)

Why choose this adapter

• Your RIDGID 18V battery and MacNaught 18V tools run at the same voltage, so the adapter changes the fitting rather than converting anything.
• 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.
• Made for the RIDGID 18V batteries sold at Home Depot, so the fit is the one you already own.
• Covered by a 12-month warranty from the day it arrives.

RIDGID 18V and MacNaught 18V compatibility

It works in one direction only: RIDGID 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 RIDGID 18V 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 RIDGID 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 RIDGID 18V battery.

Before you buy