CR2016 Lithium Coin Cell Battery Pinout, Datasheet, Equivalent, and Specifications
HAHIYO 2 x 3V CR2032 Button Coin Cell Battery Holder with Leads ON/Off Switch Snap in No Screw Needed Clear Mark Polarity Easy Solder Wire Easy Insert Remove Firm Hold Not Deform
Button cell - Wikipedia
Our tips for Coin Cell Batteries - Tutorial Australia