Bosch (Blue) 18V to Ryobi 18V Battery Adapter

Use your Bosch 18V GBA (Blue) batteries on Ryobi 18V ONE+ cordless tools, without buying into a second battery platform. Power passes straight through: Bosch 18V GBA (Blue) and Ryobi 18V ONE+ share the same 18V rating. Built with a durable injection-molded ABS housing and pure copper contacts for steady current delivery. One battery platform across more tools means less spent on batteries and less to keep charged.

Specifications

• SKU PTA-BOSB18-RYO18
• Fits this battery Bosch 18V GBA (Blue) (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 139 g (4.9 oz / 0.31 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 March 6, 2022)

Why choose this adapter

• Your Bosch 18V GBA (Blue) 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.

Bosch 18V GBA (Blue) and Ryobi 18V ONE+ compatibility

It works in one direction only: Bosch 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 Bosch 18V GBA (Blue) 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 Bosch 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 Bosch 18V GBA (Blue) battery.