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 is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- PCB
- A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
- 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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