Adafruit
CR2032 Lithium Coin Cell Battery
$1.85
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In stock at supplier
A standard CR2032 lithium coin cell battery providing 3V nominal output. This non-rechargeable cell is widely used in electronics projects, wearables, and se...
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A standard CR2032 lithium coin cell battery providing 3V nominal output. This non-rechargeable cell is widely used in electronics projects, wearables, and sewable circuits.
Specifications
- Type – CR2032 lithium coin cell (non-rechargeable)
- Nominal Voltage – 3V (starts at ~3.2V, drifts to ~2.5V over life)
- Capacity – 220 mAh (at 0.2 mA constant draw)
- Diameter – 20 mm
- Thickness – 3.2 mm
Ideal For
- Sewable coin cell holders and e-textile projects
- LED badges and wearable electronics
- Real-time clock (RTC) modules
- Small sensor projects
Warning: Button cell batteries are hazardous (new or used). Keep away from children. Button cell batteries can cause severe or fatal injuries in 2 hours or less if swallowed or placed inside any part of the body. If you suspect a child has swallowed or inserted a button cell battery, call the 24-hour Poisons Information Centre in Australia on 131 126 or in New Zealand on 0800 764 766, or contact your country's emergency department.
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- 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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