This is a ready to use 3d printed adapter(only) to use your Bosch Nicad tools with Dewalt Lithium batteries. NO modifications to your tools or batteries and it locks in place. I can't say it fits on all of the Bosch 18v/24v Nicad tools but it does work on all the tools in the pictures.
Dewalt 20v Lowprofile Battery Adapter for Bosch 18v Tools
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Replacement for Dewalt 20V Lithium Battery Adapter for Bosch to Dewalt 20V MAX XR Cordless Tool, Convert Bosch 18V Lithium Battery BAT609 BAT612 to DeWalt 18V/ 20V Lithium Ion Battery DCB200
STL file Bosch 18v NiCad Tool to DeWalt 20v Max Battery Adapter 🔋・3D printer design to download・Cults
Bosch Lithium Ion 18v Battery Adaptor DIY NiMH Power Tool vs NiCd NiCad Li Drill Jigsaw Driver
DEWALT 20V MAX Lithium-Ion Battery Adapter for 18V Tools DCA1820 - The Home Depot
Will I notice a difference between this and the 20 v dewalt? Didn't notice that these were 18v : r/Tools
20V MAX* Battery Adapter Kit for 18V Tools
Dewalt to Bosch PBA Battery Adapter - Powuse