Bauer 20V to Earthquake XT 20V Battery Adapter

Use your Bauer 20V batteries on Earthquake 20V XT cordless tools, without buying into a second battery platform. Power passes straight through: Bauer 20V and Earthquake 20V XT share the same 20V rating. Built with an injection-molded ABS battery interface, a 3D-printed ABS tool socket for a close fit, and pure copper contacts. One battery platform across more tools means less spent on batteries and less to keep charged.

Specifications

• SKU PTA-BAU20-EQX20
• Fits this battery Bauer 20V (Lithium-Ion) from Harbor Freight
• Battery voltage 20V
• Runs these tools Earthquake 20V XT (Lithium-Ion) from Harbor Freight
• Tool voltage 20V
• 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 119 g (4.2 oz / 0.26 lb)
• Dimensions (L × W × H) How It's Measured 114 × 76 × 55 mm (4.49 × 2.99 × 2.17 in)
• 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 October 15, 2026)

Why choose this adapter

• Your Bauer 20V battery and Earthquake 20V XT 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 Bauer 20V batteries sold at Harbor Freight, so the fit is the one you already own.
• Covered by a 12-month warranty from the day it arrives.

Bauer 20V and Earthquake 20V XT compatibility

It works in one direction only: Bauer batteries powering Earthquake tools. For the opposite pairing, see adapters that run on Earthquake 20V XT batteries.

Compatibility can vary with the exact battery and tool model. Before ordering, confirm that your battery belongs to the Bauer 20V platform and that your tool takes Earthquake 20V XT batteries.

Important charging and safety information

This adapter is for powering cordless tools and nothing else. It cannot charge Bauer or Earthquake 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 Bauer 20V battery.