The Panasonic CR2412 is a 3V lithium coin cell with a diameter of 24.5mm, height of 1.2mm, and a nominal capacity of 100mAh. It operates between -30°C to +85°C, making it ideal for compact devices like wearables, medical sensors, and IoT modules. Its lithium manganese dioxide (Li-MnO2) chemistry ensures stable voltage output and a shelf life of up to 10 years.
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Which Devices Commonly Use the CR2412 Battery?
This battery powers small electronics requiring thin profiles, such as fitness trackers, glucose monitors, car key fobs, and smart cards. Its low self-discharge rate (less than 1% per year) suits applications needing infrequent battery replacements. Panasonic’s leak-resistant design also makes it safe for implantable medical devices and temperature-sensitive gadgets.
In industrial settings, the CR2412 is increasingly used in wireless sensors for predictive maintenance systems. These sensors monitor vibration and temperature in machinery, transmitting data via IoT networks. The battery’s ability to handle brief high-current pulses (up to 15mA) makes it suitable for RFID tags in logistics, where rapid data transmission is critical. Recent adoption in ultra-thin Bluetooth trackers—like those attached to wallets or keys—highlights its versatility in consumer tech. Engineers also favor it for backup power in CMOS chips, where its decade-long shelf life prevents data loss during main power failures.
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How Does the CR2412 Compare to Similar Lithium Coin Cells?
Unlike thicker CR2032 (3.2mm) or CR2025 (2.5mm) cells, the CR2412’s 1.2mm height allows ultra-slim integration. It offers slightly lower capacity than the CR2032 (225mAh) but excels in space-constrained scenarios. For example, it outperforms SR41 alkaline batteries in cold environments due to lithium chemistry’s thermal resilience.
| Model | Diameter | Height | Capacity | Best For |
|---|---|---|---|---|
| CR2412 | 24.5mm | 1.2mm | 100mAh | Wearables, medical implants |
| CR2032 | 20mm | 3.2mm | 225mAh | Calculators, motherboards |
| SR41 | 7.9mm | 3.6mm | 42mAh | Watches, laser pointers |
How to Maximize CR2412 Battery Lifespan?
Store batteries at 20°C and 50% humidity. Avoid exposing devices to prolonged heat (>60°C), which accelerates self-discharge. In circuits drawing over 2mA, pair the CR2412 with a capacitor to smooth load spikes. For example, a 47μF capacitor can extend operational life by 12% in pulse-heavy applications like RFID tags.
When designing circuits, minimize standby current to below 10μA using power gating techniques. In devices with intermittent use (e.g., smart locks), implement deep sleep modes to reduce average consumption. For environments with fluctuating temperatures, use thermal insulation around the battery compartment to stabilize discharge rates. Panasonic recommends replacing batteries when voltage drops to 2.5V under load—a 16% decrease from nominal 3V—to prevent unexpected shutdowns in critical systems.
“The CR2412’s balance of form factor and reliability is unmatched. In medical devices, even a 0.1V drop can skew sensor readings. Panasonic’s tight voltage tolerance (±0.2V under load) ensures clinical-grade accuracy.”
FAQ
- Can I use a CR2025 instead of a CR2412?
- No—the CR2025 is 2.5mm thick versus 1.2mm for the CR2412. Forcing a thicker battery risks damaging device contacts.
- Is the CR2412 mercury-free?
- Yes. Panasonic eliminated mercury in all lithium coin cells since 1992, complying with RoHS and REACH regulations.
- What’s the maximum continuous current for the CR2412?
- 3mA. Exceeding this causes voltage sag and reduced cycle life. For higher loads, consider lithium polymer batteries.