The Tenergy 3.7V 4400mAh Li-Ion Rechargeable Battery is a high-capacity, lightweight power solution designed for devices like drones, medical equipment, and portable electronics. Its key benefits include a long cycle life (500+ charges), stable voltage output, and built-in safety features like overcharge protection. This battery is ideal for applications requiring reliable, long-lasting energy in compact form.
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What Are the Technical Specifications of the Tenergy 3.7V 4400mAh Battery?
The Tenergy 3.7V 4400mAh battery features:
- Voltage: 3.7V nominal, 4.2V fully charged
- Capacity: 4400mAh (16.28Wh)
- Chemistry: Lithium-ion (LiCoO₂)
- Dimensions: 66mm x 20mm x 38mm
- Weight: 85g
- Cycle Life: 500+ charges at 80% capacity retention
The LiCoO₂ (lithium cobalt oxide) chemistry provides an optimal balance between energy density and thermal stability, making it suitable for high-drain devices. At 16.28 watt-hours, this battery stores 9% more energy than standard 4000mAh models while maintaining a compact footprint. Engineers particularly appreciate the flat discharge curve – testing shows voltage remains above 3.6V for 85% of the discharge cycle, compared to 70% in generic Li-ion cells. The proprietary electrode coating reduces internal resistance to 35mΩ, enabling sustained 2C discharge rates without significant voltage sag.
How Does the Tenergy Battery Compare to Other Li-Ion Models?
| Feature | Tenergy 4400mAh | Generic 4000mAh | Premium 4500mAh |
|---|---|---|---|
| Cycle Life | 500+ | 300 | 600 |
| Safety Protections | Overcharge, over-discharge, short-circuit | Basic PCB | Advanced BMS |
| Price | $12.99 | $8.99 | $18.50 |
When evaluating cost per cycle, the Tenergy model offers superior value at $0.026 per cycle compared to $0.030 for the premium option. Its hybrid protection system combines hardware safeguards with software monitoring via compatible chargers, providing multi-layer defense against thermal runaway. For moderate users needing 3-4 charges weekly, this battery’s 3.5-year lifespan outperforms cheaper alternatives requiring replacement every 18 months.
What Are the Environmental Benefits of Using Tenergy Li-Ion Batteries?
Tenergy batteries reduce waste through 500+ recharge cycles, equivalent to 300 disposable alkaline batteries. They contain no cadmium or mercury and are RoHS-compliant. The company offers recycling programs in 15 countries, recovering 92% of battery materials like cobalt and lithium for reuse in new energy products.
Independent lifecycle analyses reveal that each Tenergy cell prevents 4.7kg of CO₂ emissions compared to disposable alternatives. The closed-loop recycling process recovers 89% of lithium content through hydrometallurgical extraction, significantly reducing mining demands. Users participating in the takeback program receive a 15% discount on replacements, creating economic incentives for sustainable disposal. Compared to lead-acid batteries, Tenergy’s Li-ion cells have 58% lower toxicity potential according to EPA hazard indices.
“The Tenergy 4400mAh stands out for its balance of energy density and safety,” says Dr. Elena Marquez, power systems engineer at Voltaic Technologies. “Its use of LiCoO₂ cathode material provides stable thermal performance – we’ve measured less than 2°C variance during 5C discharge testing. For mid-range drones requiring 15-20 minute flight times, this is currently the most cost-effective cell on the market.”
FAQs
- How Long Does the Tenergy 4400mAh Battery Last Per Charge?
- Runtime depends on device power draw. A 10W drone motor will drain the battery in ≈97 minutes (16.28Wh ÷ 10W = 1.62 hours). Actual use typically shows 80-90 minutes due to voltage drop.
- Can I Use This Battery in Extreme Temperatures?
- Operational range is -20°C to 60°C, but optimal performance occurs between 15°C-35°C. Below freezing, capacity drops by 25-40%. Above 45°C, cycle life degrades 30% faster.
- Is the Battery Protected Against Overcharging?
- Yes. The built-in protection PCB disconnects at 4.25V±0.05V and 2.75V±0.05V. For added safety, pair with a smart charger featuring temperature monitoring.