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    Featured products

    • Industrial Right Angle adapter for Dewalt 20V MAX or Hercules battery

      Industrial Right Angle adapter for Dewalt 20V MAX or Hercules battery

      Industrial Right Angle adapter for Dewalt 20V MAX or Hercules battery

      Regular price From $32.30 USD
      Regular price Sale price From $32.30 USD
      Unit price /  per 
    • X adapter for Dewalt 20V MAX or Hercules battery

      X adapter for Dewalt 20V MAX or Hercules battery

      X adapter for Dewalt 20V MAX or Hercules battery

      Regular price From $14.00 USD
      Regular price Sale price From $14.00 USD
      Unit price /  per 
    • XT adapter for Milwaukee 18V  battery

      XT adapter for Milwaukee 18V battery

      XT adapter for Milwaukee 18V battery

      Regular price From $14.00 USD
      Regular price Sale price From $14.00 USD
      Unit price /  per 
    • X adapter for Ryobi 40V  battery

      X adapter for Ryobi 40V battery

      X adapter for Ryobi 40V battery

      Regular price From $17.50 USD
      Regular price Sale price From $17.50 USD
      Unit price /  per 
    • XT Right Angle adapter for Dewalt 20V MAX or Hercules battery

      XT Right Angle adapter for Dewalt 20V MAX or Hercules battery

      XT Right Angle adapter for Dewalt 20V MAX or Hercules battery

      Regular price From $14.30 USD
      Regular price Sale price From $14.30 USD
      Unit price /  per 
    • X adapter for Dewalt 12V MAX or Hercules battery

      X adapter for Dewalt 12V MAX or Hercules battery

      X adapter for Dewalt 12V MAX or Hercules battery

      Regular price From $14.00 USD
      Regular price Sale price From $14.00 USD
      Unit price /  per 
    • Industrial Right Angle adapter for Milwaukee 18V  battery

      Industrial Right Angle adapter for Milwaukee 18V battery

      Industrial Right Angle adapter for Milwaukee 18V battery

      Regular price From $32.30 USD
      Regular price Sale price From $32.30 USD
      Unit price /  per 
    • 30A Fused adapter for Milwaukee 18V  battery

      30A Fused adapter for Milwaukee 18V battery

      30A Fused adapter for Milwaukee 18V battery

      Regular price $15.80 USD
      Regular price Sale price $15.80 USD
      Unit price /  per 
    View all

    Battery Adapter Information & Safety Guidelines

    All battery adapters are designed and manufactured by Terrafirma Technology and are compatible with batteries from a variety of other brands. We are not affiliated with DEWALT®, MILWAUKEE®, RYOBI®, KOBALT®, Porter Cable®, or any other brand.

    Important Safety Information

    • Fuse Protection: Use a fuse rated about 30% higher than the max current you expect to draw.
    • Battery Protection: Add a low-voltage disconnect circuit or a timer to prevent the battery from dropping below its safe threshold.

    Typical low-voltage threshold ≈ (Max battery voltage ÷ 4.2) × 3.3

    • Voltage Regulation: Always use a DC-DC converter to match your device’s acceptable voltage range.

    Failure to follow these precautions can damage your battery, shorten its lifespan, or harm the device. We do not recommend using our adapters without fully understanding proper protection.

    All power adapters are designed and assembled in Ohio, USA, using heat- and chemical-resistant materials.

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