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

Use your AEG 18V batteries on MacNaught 18V cordless tools, without buying into a second battery platform. Both run at 18V, so the adapter changes the fitting and not the voltage. The battery side is injection-molded ABS and the tool interface is high-precision 3D-printed ABS for an accurate fit, with pure copper contacts carrying the current. It is a cost-effective way to get more from the batteries you have, with no second charger to maintain. It also carries battery protection electronics (BMS) inside.

Specifications

• SKU PTA-AEG18-MNA18
• Fits this battery AEG 18V (Lithium-Ion)
• 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 118 g (4.2 oz / 0.26 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 AEG 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.
• Covered by a 12-month warranty from the day it arrives.

AEG 18V and MacNaught 18V compatibility

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