Simply buy Button cell / special battery CR2032 CR2032

Dorcy Mastercell 2 Pack Lithium 2032 coin cell

Dorcy Mastercell Lithium 2032 Coin Cell Batteries (2 Pack)

D'Addario CR2032 Lithium 3V Battery (4-pack)

Battery Holder Cr2032 Connector 2 Cr2032 Button Battery Holder - 5 Pcs Cr2032 - Aliexpress

10x einfacher CR2032 3V Knopf Knopfzellen Batteriehalter Gehäusekasten Scha Sxb

Simple but effective - this sewable breakout board has a CR2032 coin cell battery holder soldered on and 0.1 pitch breakout pins for easy connecting. Great for powering very low-current projects, or adding a battery backup circuit to a real-time clock or similar. Comes with one fully assembled and tested coin cell battery holder and a small stick of 0.1 header so you can solder it on and plug into a breadboard. Coin cell battery is not included.

Adafruit 20mm Coin Cell Breakout Board CR2032 Ada1870

50 Pack CR2032 Lithium Batteries + Free Tester – Battery Hookup

Coin cell battery emulator CR2016/CR2032 from Bobricius on Tindie

Everything You Need To Know About The CR2032 Battery

Duracell 2032 Lithium Coin Batteries, 8 ct.

Duracell Lithium Cr2032 Coin Batteries (2-Pack) in the Coin & Button Batteries department at

CR2032 Battery Lithium CR2032 Coin Cell Battery