Bosch professional - dewalt yellow.
Bosch Home (Green) Tool Adapter for Einhell 18v Battery ( Jadapters )
Badaptor: The Power Tool Battery Adaptor Tooled-Up Blog
Adapter: Bosch Power4All batteries to Einhell 18-V drill by Joerg_H, Download free STL model
Adapter (adapter) For Battery Milwaukee M18-to Tool Einhell 18v - Power Tool Accessories - AliExpress
Einhell TE-CP 18 Li USB Powerbank Adaptor for Power X-Change Batteries
Bosch Home (Green) Tool Adapter for Einhell 18v Battery ( Jadapters )
Bosch 18v Battery Adapter - Australia
Einhell 18V Battery - Bosch Professional 18 V Tool adapter ( Jadapters )
DIY: Lithium Battery to NiCd Power Tool (With Simple Adapter) : 11 Steps (with Pictures) - Instructables
Einhell Battery Adapter Connector Adapter Convert Einhell Bosch - Bosch 18 20v - Aliexpress
2-in-1 Dewalt/Milwaukee to Bosch Battery Adapter - Powuse