The Panasonic CR3032 is a 3V lithium coin cell battery with a capacity of 500mAh, designed for long-term use in devices like medical sensors, car keys, and wearables. Its datasheet highlights a temperature range of -30°C to 70°C, a 10-year shelf life, and compliance with IEC 60086-4 standards. It’s mercury-free and optimized for low-drain applications.
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How Does the CR3032 Compare to Similar Lithium Coin Cells?
The CR3032 offers higher capacity (500mAh) than the CR2032 (225mAh) and CR2025 (170mAh), making it ideal for devices requiring extended runtime. Its 3V output matches standard lithium coin cells, but its thicker 3.2mm design provides better energy density. Unlike alkaline alternatives, it maintains stable voltage in extreme temperatures and resists leakage.
| Model | Capacity | Diameter | Thickness |
|---|---|---|---|
| CR3032 | 500mAh | 30.0mm | 3.2mm |
| CR2032 | 225mAh | 20.0mm | 3.0mm |
| CR2025 | 170mAh | 20.0mm | 2.5mm |
What Applications Are Best Suited for the CR3032 Battery?
This battery powers medical implants, IoT sensors, key fobs, and fitness trackers due to its compact size and reliability. Its low self-discharge rate (2% annually) ensures readiness for emergency devices like smoke alarms. Industrial uses include backup power for CMOS chips and real-time clocks in electronics.
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How Should the CR3032 Be Stored and Handled Safely?
Store CR3032 batteries at 20°C in dry conditions away from metal objects to prevent short-circuiting. Avoid piercing or heating above 100°C, which could trigger thermal runaway. Panasonic recommends using gloves during installation to prevent skin oils from corroding contacts. Dispose of spent cells through certified recycling programs to minimize environmental impact.
What Certifications Does the Panasonic CR3032 Hold?
Panasonic’s CR3032 meets IEC 60086-4 safety standards for lithium batteries and is RoHS/REACH compliant. It carries UL certification under MH12490 for consumer use and adheres to UN38.3 transportation regulations. Medical-grade variants comply with ISO 13485 for implantable device compatibility.
The battery’s IEC 60086-4 certification specifically addresses performance under continuous discharge conditions, requiring less than 5% capacity loss after 720 hours of testing. For medical applications, the ISO 13485 certification involves rigorous batch tracing and sterile packaging protocols. Panasonic’s manufacturing facilities undergo annual audits by TÜV SÜD to maintain these certifications, with full documentation available through their global compliance portal.
| Certification | Standard | Scope |
|---|---|---|
| IEC 60086-4 | Safety of lithium batteries | Global |
| ISO 13485 | Medical device quality | Implantable devices |
| UN38.3 | Transportation safety | Air/sea shipping |
How Does Temperature Affect CR3032 Output and Lifespan?
At -30°C, the CR3032 maintains 85% of its nominal capacity with a 0.3V drop. Above 50°C, accelerated self-discharge occurs (4%/month vs. 0.15% at 20°C). Continuous high-drain use above 1mA reduces total energy yield by 18% compared to pulsed discharge patterns recommended by Panasonic.
Extended exposure to temperatures above 70°C can permanently damage the cell’s internal chemistry, reducing capacity by up to 40% after just 200 hours. In sub-zero conditions, the battery’s internal resistance increases significantly – from 5Ω at 20°C to 22Ω at -30°C. Panasonic’s technical white papers recommend derating capacity by 15% when designing for continuous operation below -10°C. For optimal performance, engineers should implement thermal management systems that keep the battery within its ideal 10°C-35°C operating window.
“Panasonic’s CR3032 sets the benchmark for coin cells in medical tech. Its multi-layered separator design prevents dendritic growth even after 10+ years in pacemakers. We’ve validated 99.998% reliability across 2 million units – unmatched in the industry.” – Dr. Elena Torres, Power Systems Engineer, MedDev Solutions
- Can I replace a CR2032 with a CR3032?
- No – the CR3032 is 3.2mm thick vs. CR2032’s 3.0mm, potentially causing fit issues. Voltage matches, but capacity differences may require firmware adjustments in sensitive devices.
- What’s the shelf life of an unopened CR3032?
- 10 years when stored below 25°C at ≤65% humidity. Panasonic’s nitrogen-sealed packaging extends freshness – check for the N₂ icon on authentic cells.
- Are CR3032 batteries rechargeable?
- No – attempting to recharge this primary lithium cell risks explosion. For rechargeable needs, consider Li-ion ML-type batteries with similar dimensions.