Adafruit
20mm Coin Cell Breakout w/On-Off Switch (CR2032)
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A sewable breakout board with a CR2032 coin cell battery holder, built-in on/off switch, and 0.1" pitch breakout pins. The board provides two ground pins, on...
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A sewable breakout board with a CR2032 coin cell battery holder, built-in on/off switch, and 0.1" pitch breakout pins. The board provides two ground pins, one switched power pin, and one always-on power pin — giving you flexibility in how you manage power in your project.
Also available: version without switch.
Key Features
- On/Off Switch – Control power without removing the battery
- Switched + Always-On Pins – Two ground pins, one switched and one always-on power pin
- CR2032 Coin Cell Holder – Pre-soldered 20mm coin cell socket
- 0.1" Pitch Breakout – Header pins for breadboard or PCB connection
- Sewable – Mounting holes for e-textile and wearable projects
Ideal For
- Wearable electronics with power control
- Battery backup for real-time clocks (RTC)
- Low-current breadboard prototyping
- E-textile and sewable projects
Package Contents
- 1× 20mm Coin Cell Breakout Board with On/Off Switch (assembled and tested)
- 1× 0.1" Header Strip
Note: CR2032 coin cell battery is not included.
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
- RTC
- A Real-Time Clock keeps track of time even when the main processor is asleep or powered down, usually with a small backup battery. It matters for data logging and tracking projects that need accurate timestamps.
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Power & Batteries
Wearables & E-textiles
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