Stanley V20 to Milwaukee 18V Battery Adapter-0

Stanley V20 to Milwaukee 18V Battery Adapter

$49.86
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Stanley V20 to Milwaukee 18V Battery Adapter-0

Stanley V20 to Milwaukee 18V Battery Adapter

$49.86

Use your Stanley V20 batteries on Milwaukee M18 cordless tools, without buying into a second battery platform. Constructed from 3D-printed ABS with pure copper contacts, for an accurate fit and dependable current transfer. It removes the need to keep separate batteries for different platforms, which saves money and simplifies the workflow.

Specifications

  • Fits this battery Stanley V20 (Lithium-Ion)
  • Battery voltage 20V
  • Runs these tools Milwaukee M18 (Lithium-Ion)
  • Tool voltage 18V
  • Housing ABS (3D)
  • 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 114 g (4.0 oz / 0.25 lb)
  • Dimensions (L × W × H) 111 × 74 × 52 mm (4.37 × 2.91 × 2.05 in)
  • Colour Black
  • 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 5, 2025)

Why choose this adapter

  • 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.
  • Covered by a 12-month warranty from the day it arrives.

Stanley V20 and Milwaukee M18 compatibility

It works in one direction only: Stanley batteries powering Milwaukee tools. For the opposite pairing, see adapters that run on Milwaukee M18 batteries.

Compatibility can vary with the exact battery and tool model. Before ordering, confirm that your battery belongs to the Stanley V20 platform and that your tool takes Milwaukee M18 batteries.

Important charging and safety information

This adapter is for powering cordless tools and nothing else. It cannot charge Stanley or Milwaukee 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 Stanley V20 battery.

Before you buy

Milwaukee M18 tools

  • Milwaukee 2771-20 Transfer Pump: Inside the battery compartment, a small piece of plastic must be trimmed. Will not work with Ryobi battery due to spacing issue. See photo
  • Milwaukee 2825-20ST Fuel String Trimmer: The black shroud needs to be removed or slightly trimmed. See photo

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