Parkside cordless drill charger - Li-ion PABSW 10.8 B2

This is charger - battery holder for Parkside cordless drill - Li-ion PABSW 10.8 B2
You only need to add spring contacts like from paperclip and 12V 1A power supply. Polarity is marked on the battery, you need to connect only + and -.
The battery has internal charging circuit. It eats 0.5A when charging and current drops to zero when fully charged. I didn't build led indicators for it but i plan to add ampermeter.

It has 4 3,2mm mounting holes to hold it on some surface or box.