Adafruit
12mm Coin Cell Breakout Board
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$4.20
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A simple breakout board with a CR1220 coin cell battery holder pre-soldered and broken out to 0.1″ pitch pins. Ideal for powering very low-current projects o...
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A simple breakout board with a CR1220 coin cell battery holder pre-soldered and broken out to 0.1″ pitch pins. Ideal for powering very low-current projects or providing battery backup for a real-time clock (RTC) module.
Comes fully assembled and tested, with a stick of 0.1″ header included so you can solder it on and plug directly into a breadboard.
Key Features
- CR1220 Holder – Accepts standard 12 mm CR1220 coin cell batteries
- Breadboard-Friendly – 0.1″ pitch header pins (included, requires soldering)
- Pre-Assembled – Battery holder soldered and tested, ready to use
- Compact – Minimal footprint for space-constrained projects
Ideal For
- Battery backup for RTC modules (DS1307, DS3231, etc.)
- Low-power wearable electronics and LED throwies
- Powering small microcontroller projects during prototyping
Package Contents
- 1× 12 mm Coin Cell Breakout Board (with CR1220 holder)
- 1× 0.1″ header strip
Note: CR1220 battery not included. Also available with an on/off switch.
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.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- 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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