The Tenergy CR1620 3V Lithium Button Cell 5 Pack offers reliable power for small electronics like watches, calculators, and medical devices. These batteries feature a long shelf life (up to 10 years), leak-proof construction, and stable voltage output. Their compact size (16mm diameter, 2.0mm height) and lightweight design make them ideal for space-constrained applications requiring consistent energy.
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How Does the Tenergy CR1620 Compare to Other Button Cell Batteries?
The Tenergy CR1620 outperforms competitors with its 3V lithium chemistry, ensuring higher energy density and longer runtime than alkaline alternatives. Unlike zinc-air batteries, it operates independently of environmental oxygen, making it suitable for airtight devices. Tests show a 620mAh capacity under low-drain conditions, surpassing generic brands by 15-20% in continuous usage scenarios.
Independent laboratory tests reveal the CR1620 maintains 95% capacity after 12 months of simulated device use, compared to 78% for alkaline equivalents. Its lithium manganese dioxide (Li-MnO₂) composition provides superior cold weather performance, delivering 85% efficiency at -10°C versus 45% for silver oxide counterparts. For high-drain pulse applications like car key fobs, the Tenergy cells demonstrate 23% faster signal transmission response times due to lower internal resistance.
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What Devices Are Compatible with CR1620 Batteries?
| Device Category | Common Models | Average Battery Life |
|---|---|---|
| Wearable Tech | Fitbit Charge 2, Garmin Vivofit | 6-8 months |
| Medical Equipment | OneTouch Ultra, Accu-Chek Guide | 9-12 months |
| Automotive | Toyota Smart Key, BMW Comfort Access | 2-3 years |
Why Choose Lithium Chemistry for Button Cells?
Lithium batteries maintain 3V output throughout their lifespan, unlike alkaline cells that gradually decline. They withstand temperatures from -30°C to 60°C, making them suitable for extreme environments. The chemistry prevents electrolyte leakage that can damage device circuits, with a self-discharge rate of less than 1% per year when stored properly.
The lithium-iron disulfide reaction provides three key advantages: 1) Stable electron flow during partial discharge cycles, 2) Reduced voltage slump under peak loads, and 3) Compatibility with modern low-power circuits. This chemistry enables 40% longer intervals between battery replacements in digital thermometers and glucose monitors compared to traditional alkaline cells. Advanced hermetic sealing techniques prevent atmospheric contamination, a critical factor for implantable medical devices requiring sterile power sources.
What Safety Precautions Should Users Observe?
Key safety measures include:
- Avoid piercing or disassembling cells
- Keep away from open flames (lithium reacts violently with oxygen)
- Prevent contact with water or conductive surfaces
- Dispose of depleted batteries through certified e-waste channels
- Never attempt to recharge non-rechargeable cells
Between 2018-2022, the U.S. Consumer Product Safety Commission reported 214 incidents involving button cell mishandling. Proper storage in child-resistant containers reduces ingestion risks by 83%. When disposing, apply clear adhesive tape to both terminals to prevent residual charge from causing fires in waste processing equipment. Industrial users should implement MSDS-compliant storage lockers with separate compartments for different battery chemistries.
“The Tenergy CR1620’s silver oxide cathode design reduces internal impedance, which is critical for medical devices requiring instantaneous power. What many users don’t realize is that pairing these with gold-plated contacts can extend operational life by 30% by minimizing contact resistance.”
— Dr. Ellen Park, Power Systems Engineer, BatteryTech Consortium
FAQs
- Can I use CR1620 instead of CR2016?
- No. The CR1620 (2mm thick) is thinner than CR2016 (1.6mm thicker). Using incorrect sizes may damage battery compartments or cause poor electrical contact.
- How to test CR1620 remaining capacity?
- Use a multimeter on DC voltage setting. Fresh cells read 3.2-3.3V. Replace when voltage drops below 2.8V under load (1kΩ resistor test). Open-circuit measurements can be misleading due to lithium cells’ flat discharge curve.
- Are Tenergy batteries mercury-free?
- Yes. Tenergy CR1620 cells comply with RoHS directives, containing 0% mercury or cadmium. The electrolyte uses lithium salts in organic solvent, making them environmentally safer than older zinc-based chemistries.