Li-ion battery holder

I design this Li-ion battery holder to my electronic and robot projects. It is trial solution to these sensitive issue.

I try to use wires like contacts to avoid commercial contacts.

The body of holder works like a spring to make better electrical contacts.

Now I am trying different paces in design.

This design is related to my design https://www.thingiverse.com/thing:2702778 and inspirited by flexing battery holder https://www.thingiverse.com/thing:456900 .