AuthFrank Battery Adapter converts for Bosch 18V Lithium Battery to for Makita 18V Lithium Battery BL1840 BL1850 BL1830 BL1860B LXT 400 etc.
Bosch to Ryobi One+ 18V Battery Adapter | Badaptor
Pcapzz Battery Adapter,Compatible with Bosch 18V GBA Battery Convert to PBA Battery Safe Portable Battery Converter Compatible with Bosch 18V Garden Series Green Power Tool - Walmart.com