DeWalt 20V to Chicago Electric 18V Battery Adapter

Use your DeWalt 20V MAX batteries on Chicago Electric 18V cordless tools, without buying into a second battery platform. 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. Fewer battery systems in the workshop, on the bench or in the van, and no extra chargers to find room for.

Specifications

• SKU PTA-DWM20-CHI18
• Fits this battery DeWalt 20V MAX (Lithium-Ion)
• Battery voltage 20V
• Runs these tools Chicago Electric 18V (Lithium-Ion) from Harbor Freight
• 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 131 g (4.6 oz / 0.29 lb)
• Colour Black, Yellow
• Operating humidity 5–95% RH
• Operating temperature -10 °C to 50 °C (14 °F to 122 °F)
• USB port No
• What's in the box Battery adapter
• Warranty 12 months after the date of delivery
• Revision Revision 01 (released on August 17, 2025)

Why choose this adapter

• 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 Chicago Electric 18V compatibility

It works in one direction only: DeWalt batteries powering Chicago Electric tools. For the opposite pairing, see adapters that run on Chicago Electric 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 Chicago Electric 18V batteries.

Important charging and safety information

This adapter is for powering cordless tools and nothing else. It cannot charge DeWalt or Chicago Electric 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.