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

Use your Bosch 18V GBA (Blue) batteries on Bosch 18V PBA (Green) cordless tools, without buying into a second battery platform. Power passes straight through: Bosch 18V GBA (Blue) and Bosch 18V PBA (Green) share the same 18V rating. Built with a durable injection-molded ABS housing and pure copper contacts for steady current delivery. It removes the need to keep separate batteries for different platforms, which saves money and simplifies the workflow.

Specifications

• SKU PTA-BOSB18-BOSG18
• Fits this battery Bosch 18V GBA (Blue) (Lithium-Ion)
• Battery voltage 18V
• Runs these tools Bosch 18V PBA (Green) (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
• 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 June 22, 2024)

Why choose this adapter

• Your Bosch 18V GBA (Blue) battery and Bosch 18V PBA (Green) 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 Bosch 18V PBA (Green) compatibility

It works in one direction only: Bosch batteries powering Bosch tools. For the opposite pairing, see adapters that run on Bosch 18V PBA (Green) 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 Bosch 18V PBA (Green) batteries.

Important charging and safety information

This adapter is for powering cordless tools and nothing else. It cannot charge Bosch or Bosch 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.

Before you buy