Hercules 20V to Black and Decker 20V Battery Adapter

Use your Hercules 20V batteries on Black and Decker 20V cordless tools, without buying into a second battery platform. Both run at 20V, so the adapter changes the fitting and not the voltage. Built with a durable injection-molded ABS housing and pure copper contacts for steady current delivery. One battery platform across more tools means less spent on batteries and less to keep charged.

Specifications

• SKU PTA-HER20-BLA20
• Fits this battery Hercules 20V (Lithium-Ion) from Harbor Freight
• Battery voltage 20V
• Runs these tools Black and Decker 20V (Lithium-Ion)
• Tool voltage 20V
• Housing ABS (Injected)
• 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, Blue
• 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 17, 2025)

Why choose this adapter

• Your Hercules 20V battery and Black and Decker 20V tools run at the same voltage, so the adapter changes the fitting rather than converting anything.
• Injection-moulded ABS, not 3D printed — no layer lines to split under load.
• 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 Hercules 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.

Hercules 20V and Black and Decker 20V compatibility

It works in one direction only: Hercules batteries powering Black and Decker tools. For the opposite pairing, see adapters that run on Black and Decker 20V batteries.

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

Important charging and safety information

This adapter is for powering cordless tools and nothing else. It cannot charge Hercules or Black and Decker 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 Hercules 20V battery.