Hilti 22V to Milwaukee 18V Battery Adapter

Use your Hilti 22V batteries on Milwaukee M18 cordless tools, without buying into a second battery platform. Your Hilti 22V battery is 22V where Milwaukee M18 tools expect 18V. A DC-DC converter inside steps it down and holds it there, so the tool never sees more than it is built for. Constructed from durable molded ABS with pure copper contacts, for a secure fit and dependable current transfer. One battery platform across more tools means less spent on batteries and less to keep charged.

Specifications

• SKU PTA-HIL22-MIL18
• Fits this battery Hilti 22V (Lithium-Ion)
• Battery voltage 22V
• Runs these tools Milwaukee M18 (Lithium-Ion)
• Tool voltage 18V
• Housing ABS (Injected)
• DC-DC converter Yes — 22V to 18V
• Terminals Copper
• Weight 108 g (3.8 oz / 0.24 lb)
• 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 August 17, 2026)

Why choose this adapter

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

Hilti 22V and Milwaukee M18 compatibility

It works in one direction only: Hilti 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 Hilti 22V 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 Hilti 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 Hilti 22V battery.

Before you buy