This adapter lets DeWalt 20V MAX lithium-ion batteries run Hercules 20V cordless tools from Harbor Freight, so you can skip a second battery platform and its chargers. It is a molded ABS block with copper terminals, rated 40A continuous and 80A peak, and it carries built-in BMS protection electronics. It suits owners already invested in DeWalt packs who picked up a Hercules bare tool, or the reverse. Against a plain plastic adapter, the copper contacts and 40A rating are the main step up; it does not add a USB port or change voltage, and it is a single-purpose part rather than a tool.
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Rated 4.8 out of 5 from 16 ratings, buyers treat it as a simple way to keep using DeWalt packs on Hercules tools.
This adapter lets a DeWalt 20V MAX lithium-ion battery power Hercules 20V cordless tools from Harbor Freight. Both platforms are 20V, so the adapter changes the fitting rather than converting voltage. It works in one direction only: DeWalt batteries powering Hercules tools.
The housing is injection-molded ABS. The terminals are copper, and the internal wiring is 5 mm². It is rated for 40A continuous, with 80A peak at 18VDC for up to 2 seconds. A built-in battery management system (BMS) cuts power before the battery is drained too far.
The adapter only powers tools. It cannot charge DeWalt or Hercules batteries and must never be connected to a charger. Remove the battery from the adapter before charging, and charge it on the original charger made for the DeWalt 20V MAX battery. Compatibility can vary with the exact battery and tool model, so confirm that the battery is DeWalt 20V MAX and the tool takes Hercules 20V batteries.
