A battery cap should fit to battery pack from Dremel 8200 and Bosch so you can use it in any tool: Dremel, Bosch Professional (Blue), Bosch Home (green) and maybe Makita.
It looks better on tool.. this Dremel 8200 model is not 100% accurate. I dont have any good model of Bosch so pictures are only for Dremel. Printing it right now. I'll upload photos later.
Remixed from .STL so there are too many edges. Asking original authors to give me .STEP or any suitable format to work further.
Print it in that strange position as shown to make it flexible.
When i bought Dremel 8200 instead of Bosch GRO, i tested it in store to cross-fit batteries with Bosch Green. It fitted ok but i had a lot Bosch Blue batteries although i never bought children's Bosch.
So it was a surprise batteries didn't fit. Anyway battery blocks itself are identical, only cap differ.
So i found 2 stl's of Dremel and Bosch battery (and one Dremel 8200 model to paint it gold) and made crossover.