AA size battery holder

I design this AA battery holder to my electronic 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.

This design is related to my design https://www.thingiverse.com/thing:2702778, https://www.thingiverse.com/thing:2984239 and inspirited by flexing battery holder https://www.thingiverse.com/thing:456900 .