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

Use your Bosch 18V PBA (Green) batteries on Bosch 18V GBA (Blue) cordless tools, without buying into a second battery platform. Both run at 18V, so the adapter changes the fitting and not the voltage. Constructed from durable molded ABS with pure copper contacts, for a secure fit and dependable current transfer. It removes the need to keep separate batteries for different platforms, which saves money and simplifies the workflow.

Specifications

• SKU PTA-BOSG18-BOSB18
• Fits this battery Bosch 18V PBA (Green) (Lithium-Ion)
• Battery voltage 18V
• Runs these tools Bosch 18V GBA (Blue) (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 113 g (4.0 oz / 0.25 lb)
• Dimensions (L × W × H) How It's Measured 110 × 70 × 60 mm (4.33 × 2.76 × 2.36 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 June 7, 2026)

Why choose this adapter

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

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

Compatibility can vary with the exact battery and tool model. Before ordering, confirm that your battery belongs to the Bosch 18V PBA (Green) platform and that your tool takes Bosch 18V GBA (Blue) 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 PBA (Green) battery.