Portable high power LED floodlight - Akku LED-Flutlicht by CG-Tech for Bosch Akku

I wanted to build my own floodlight akku lamp but with a little difference for the Akku. I have a lot of Bosch 18V Power4All devices and Akkus and wanted to use them for this kind of lamp.

So I changed the design of the housing to be able to use the Bosch Akku for this lamp.
In future I will add an undervoltage platine to the Thing that is currently under construction.
To avoid undervoltage at the battery, as the Bosch Akkus don't have the protection build in.

I also added a printed part of the Connector, print them, glue it on 1,0mm stainless steel sheet and cut out (I did it with a dremel) to have a good battery terminal connection. 2 of this are needed.