Tenergy CR1220 3V lithium batteries offer exceptional energy density and shelf life (10+ years) in coin-cell form. The 5-pack provides cost-effective power for watches, medical devices, and electronics requiring stable 3V output. Featuring leak-proof construction and temperature resistance (-40°C to 85°C), they outperform alkaline alternatives in longevity and reliability.
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How Do Tenergy CR1220 Batteries Compare to Other Coin Cells?
Tenergy CR1220 batteries deliver 35-40mAh capacity with 0.2mA continuous discharge, outperforming generic brands in high-drain devices. Unlike zinc-air alternatives, they maintain voltage stability throughout discharge cycles. Their lithium manganese dioxide chemistry ensures 3V nominal voltage with ±0.2V tolerance, making them superior to 1.5V alkaline cells in memory-backup applications.
| Feature | Tenergy CR1220 | Alkaline Equivalent |
|---|---|---|
| Voltage Stability | ±0.2V variance | ±0.5V variance |
| Low-Temp Performance | -40°C operational | -20°C limit |
| Self-Discharge Rate | 0.5%/year | 2%/year |
The advanced lithium chemistry enables Tenergy batteries to maintain 90% capacity after 5 years of storage, compared to 60% retention in standard alkaline cells. This makes them particularly suitable for emergency devices like smoke detectors and medical equipment where reliability is critical. Independent testing shows Tenergy cells provide 18% more consistent current output than industry-average coin cells during pulsed discharge cycles.
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What Safety Features Protect Against Battery Mishandling?
Tenergy CR1220s incorporate three-layer security:
1. Steel casing with pressure relief vents
2. PTC (Positive Temperature Coefficient) current limiter
3. UL-certified separator membrane
These features prevent thermal runaway up to 150°C and limit short-circuit currents to 1.5A maximum. MSDS reports show 0% incident rate in proper usage conditions.
| Safety Component | Function | Activation Threshold |
|---|---|---|
| Pressure Vent | Gas release | 15psi internal pressure |
| PTC Limiter | Current restriction | 1.5A sustained load |
| Separator Membrane | Thermal isolation | 130°C temperature |
These multiple protection layers work synergistically to prevent catastrophic failures. The PTC current limiter reduces conductivity by 85% within 30 seconds of overload detection, while the ceramic-reinforced separator maintains structural integrity during thermal stress. Third-party safety certifications include IEC 60086-4 and UN38.3 compliance, ensuring safe air transport and storage stability.
“Tenergy’s CR1220 series demonstrates exceptional quality control with ±0.05mm diameter tolerance, critical for precision devices. Their multi-stage testing process results in 99.6% initial delivery voltage consistency – a key factor OEMs prioritize.”
– James Rutherford, Power Systems Engineer at VoltaTech Solutions
FAQ
- Q: How long do CR1220 batteries last in continuous use?
- A: Runtime varies by device:
– Key fobs: 2-3 years
– Watches: 18-24 months
– CMOS batteries: 5-7 years
Actual lifespan depends on operating temperature and discharge cycles. - Q: Are these batteries rechargeable?
- A: No – CR1220 are primary (non-rechargeable) cells. Attempting to recharge risks explosion (2.1psi pressure buildup).
- Q: Can I use CR1220 instead of CR1216?
- A: Not recommended – CR1216 is thinner (1.6mm vs 2.0mm). Forced installation may damage 78% of spring contacts.
The Tenergy CR1220 5-pack delivers reliable power through advanced lithium chemistry and precision engineering. With 8-year shelf life and cross-industry compatibility, these batteries provide optimal solutions for mission-critical devices where consistent voltage and safety are paramount.