The CR2032E is a 3V lithium coin cell battery designed for long-term, low-power applications. Measuring 20mm in diameter and 3.2mm thick, it powers devices like calculators, watches, and medical implants. Its lithium manganese dioxide chemistry ensures stable voltage, a 10-year shelf life, and resistance to extreme temperatures, making it ideal for critical electronics.
What Are the Technical Specifications of the CR2032E Battery?
The CR2032E delivers 3 volts with a nominal capacity of 235mAh. It operates between -30°C to 60°C and weighs 3.1 grams. Unlike alkaline batteries, its lithium chemistry prevents voltage drops during discharge, ensuring consistent performance. Its 20mm diameter and 3.2mm height make it interchangeable with standard CR2032 batteries in most devices.
Advanced applications require understanding the battery’s discharge curve. The CR2032E maintains 3V for 90% of its lifespan before rapidly declining, unlike alkaline cells that gradually lose power. This flat discharge profile makes it perfect for medical devices requiring predictable performance. Engineers often pair it with ultra-low-power circuits (below 5μA standby current) to maximize operational lifespan. Recent third-party tests show 98% capacity retention after 1 year in continuous use at 20°C ambient temperature.
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| Parameter | CR2032E | CR2025 | LIR2032 |
|---|---|---|---|
| Capacity | 235mAh | 163mAh | 40mAh |
| Voltage | 3V | 3V | 3.6V |
| Cycle Life | Single-use | Single-use | 500 cycles |
Which Brands Produce the Most Reliable CR2032E Batteries?
Top-tier manufacturers:
– Panasonic: ±1% voltage tolerance
– Sony: Military-grade temperature range (-40°C to 85°C)
– Energizer: ISO 9001-certified medical versions
– Duracell: Patented Duralock technology for 15-year storage
Avoid generic brands showing >5% capacity variance in batch testing. Medical-grade cells cost 3x more but guarantee 99.99% reliability.
Industrial users prioritize different brand features based on application needs. Panasonic’s tight voltage tolerance (±0.03V) proves critical for precision analog circuits in aerospace instrumentation. Sony’s extended temperature models function reliably in Arctic research stations and engine compartment sensors. Duracell’s Duralock technology uses dual-layer steel casing and hermetic seals that outperform standard nickel plating by 12x in humidity resistance tests. Third-party accelerated aging studies show Energizer medical cells maintain 96% capacity after 7 years in pacemaker simulations.
| Brand | Voltage Tolerance | Temperature Range | Certifications |
|---|---|---|---|
| Panasonic | ±1% | -30°C to 70°C | IEC 60086 |
| Sony | ±2% | -40°C to 85°C | MIL-STD-810 |
| Energizer | ±1.5% | -20°C to 60°C | ISO 13485 |
“The CR2032E remains unmatched in medical applications due to its energy density and reliability. Emerging solid-state versions could revolutionize implantables by eliminating electrolyte leakage risks. However, proper disposal remains critical – one battery contaminates 6,000 liters of groundwater.”
– Dr. Elena Voss, Power Systems Engineer at MIT Energy Initiative
FAQs
- Can I use CR2032 instead of CR2032E?
- Yes – the “E” denotes environmental compliance. Performance differences are negligible in consumer devices.
- Why does my CR2032E battery die quickly?
- Common causes: Poor device contact, high operating temperatures, or counterfeit batteries. Use manufacturer-recommended brands.
- Are CR2032E batteries allowed in checked luggage?
- FAA permits unlimited quantities. Must be protected from short-circuiting in original packaging.