RIDGID 18V to Chicago Electric 18V Battery Adapter

Use your RIDGID 18V batteries on Chicago Electric 18V cordless tools, without buying into a second battery platform. Voltage is not the obstacle here — both sides are 18V. The socket is, and that is what this solves. 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. A practical way to extend the value of the RIDGID 18V batteries you already have.

Specifications

• SKU PTA-RID18-CHI18
• Fits this battery RIDGID 18V (Lithium-Ion) from Home Depot
• Battery voltage 18V
• 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 138 g (4.9 oz / 0.3 lb)
• Colour Black, Orange
• 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

• Your RIDGID 18V battery and Chicago Electric 18V tools run at the same voltage, so the adapter changes the fitting rather than converting anything.
• 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 Chicago Electric 18V compatibility

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

Before you buy