Adapter (adapter) For Einhell 18v Battery-for Dewalt 18-20v Tool - Power Tool Accessories - AliExpress
Cameron Sino Battery For Einhell 4513377e Bt-cd 10.8/3 Li Power Tools Replacement Battery 1500mah 10.80v Dimension 58.95 X 53.84 - Rechargeable Batteries - AliExpress
Amazon.com: EHB18MTL EHB18HTL EHB18MBL Adapter Converter for Einhell Li-ion Battery for Hitachi Hikoki for Makita for Metabo Lithium Tool (EHB18MTL) : Tools & Home Improvement