Simple but effective - this breakout board has a CR1220 coin cell battery holder soldered on, an on/off switch 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. There are two ground pins, one 'switched' power pin, and one pin that is always on. Comes with one fully assembled and tested breakout plus a small stick of 0.1" header so you can solder it on and plug it into a breadboard. We also have a version without a switch Note: Battery is NOT included Specifications Dimensions: * 25mm x 23mm x 5mm * Mounting hole distance: 18mm x 19.8mm * Weight: 2g Resources * EagleCAD PCB files on GitHub * Fritzing object in the Adafruit Fritzing library https://elecena.pl/product/22711621/12mm-coin-cell-breakout-with-on-off-switch 2023-03-06 https://elecena.pl/product/22711621/12mm-coin-cell-breakout-with-on-off-switch 2023-12-27 https://elecena.pl/product/22711621/12mm-coin-cell-breakout-with-on-off-switch 2024-09-19 https://elecena.pl/product/22711621/12mm-coin-cell-breakout-with-on-off-switch 2024-11-29 https://elecena.pl/product/22711621/12mm-coin-cell-breakout-with-on-off-switch 2024-11-30 https://elecena.pl/product/22711621/12mm-coin-cell-breakout-with-on-off-switch 2025-04-09 https://elecena.pl/product/22711621/12mm-coin-cell-breakout-with-on-off-switch 2025-08-06 https://elecena.pl/product/22711621/12mm-coin-cell-breakout-with-on-off-switch 2025-11-28 https://elecena.pl/product/22711621/12mm-coin-cell-breakout-with-on-off-switch 2025-11-29