I have a few dozen of a particular smart phone battery type and was thinking of creating a battery holder for my DYI projects to reuse these batteries.
I am trying to find the little 'push/spring' type connectors that exist in your basic smart phone that connects to the 4 terminals of a typical lithium ion battery.
See attached file.
If I can find/order the little connector online I would later try to 3d print a battery connector that would hold this terminal connector, but that would be later stage.