Adafruit
12mm Coin Cell Breakout w/ On-Off Switch
A breakout board with a CR1220 coin cell battery holder, an on/off switch, and 0.1″ pitch breakout pins. Ideal for powering very low-current projects or prov...
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A breakout board with a CR1220 coin cell battery holder, an on/off switch, and 0.1″ pitch breakout pins. Ideal for powering very low-current projects or providing switchable battery backup for a real-time clock (RTC) module.
The board breaks out four pins: two ground pins, one switched power pin (controlled by the on/off switch), and one always-on power pin. Comes fully assembled and tested, with a stick of 0.1″ header included for breadboard use.
Key Features
- CR1220 Holder – Accepts standard 12 mm CR1220 coin cell batteries
- On/Off Switch – Control power to your circuit without removing the battery
- Switched & Always-On Pins – Two ground pins, one switched power, and one always-on power output
- Breadboard-Friendly – 0.1″ pitch header pins (included, requires soldering)
- Pre-Assembled – Battery holder and switch soldered and tested
Ideal For
- Battery backup for RTC modules with easy power control
- Low-power wearable electronics and LED throwies
- Prototyping projects needing a compact, switchable power source
Package Contents
- 1× 12 mm Coin Cell Breakout Board with On/Off Switch
- 1× 0.1″ header strip
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.
- 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
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