Hikoki 18V to Ryobi 18V Battery Adapter

Use your Hikoki 18V batteries on Ryobi 18V ONE+ cordless tools, without buying into a second battery platform. Both run at 18V, 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. Your existing batteries do more work, and there is no second ecosystem to buy into.

Specifications

• SKU PTA-HIK18-RYO18
• Fits this battery Hikoki 18V (Lithium-Ion)
• Battery voltage 18V
• Runs these tools Ryobi 18V ONE+ (Lithium-Ion)
• Tool voltage 18V
• 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 132 g (4.7 oz / 0.29 lb)
• Colour Black, Green
• 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 9, 2025)

Why choose this adapter

• Your Hikoki 18V battery and Ryobi 18V ONE+ 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.
• Covered by a 12-month warranty from the day it arrives.

Hikoki 18V and Ryobi 18V ONE+ compatibility

It works in one direction only: Hikoki batteries powering Ryobi tools. For the opposite pairing, see adapters that run on Ryobi 18V ONE+ batteries.

Compatibility can vary with the exact battery and tool model. Before ordering, confirm that your battery belongs to the Hikoki 18V platform and that your tool takes Ryobi 18V ONE+ batteries.

Important charging and safety information

This adapter is for powering cordless tools and nothing else. It cannot charge Hikoki or Ryobi 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 Hikoki 18V battery.

Before you buy