The Tenergy 11.1V 7800mAh Li-Ion Battery is a high-performance rechargeable battery designed for devices requiring sustained power, such as drones, medical equipment, and power tools. It features a lithium-ion chemistry for lightweight energy density, over 1,000 charge cycles, and built-in safety mechanisms. Its 11.1V voltage and 7800mAh capacity balance runtime and portability, making it ideal for professional and hobbyist applications.
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How Does the Tenergy 11.1V 7800mAh Battery Compare to Competitors?
The Tenergy 11.1V 7800mAh outperforms rivals with its superior cycle life (1,000+ cycles), 30% higher energy density than NiMH alternatives, and stable discharge rates. Competitors often use older Li-Po cells prone to swelling, while Tenergy’s Li-Ion design ensures thermal stability. Third-party tests show a 12% longer runtime in drones compared to same-capacity batteries, thanks to low internal resistance (≤50mΩ).
Independent lab tests reveal Tenergy’s cells maintain 85% capacity after 500 cycles, whereas competing brands average 72%. The battery’s prismatic cell design reduces voltage sag under heavy loads – a critical advantage for industrial tools requiring consistent torque. Unlike pouch-style Li-Po packs, Tenergy’s welded nickel terminals resist oxidation, ensuring stable connections in humid environments. Field tests with thermal imaging cameras show a 9°C lower peak temperature during 15C discharges compared to similar batteries, extending component lifespan in devices.
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What Are the Key Specifications of This Battery?
| Parameter | Value |
|---|---|
| Energy Density | 278 Wh/kg |
| Charge Voltage | 12.6V ±0.05V |
| Discharge Cutoff | 9.0V (±0.25V) |
| Cell Configuration | 3S2P (6 cells) |
| Terminal Resistance | <5mΩ per contact |
Voltage: 11.1V (3S configuration). Capacity: 7800mAh (28.1Wh). Max discharge: 15C (117A). Dimensions: 138x46x21mm. Weight: 320g. Operating temps: -20°C to 60°C. Includes overcharge, over-discharge, and short-circuit protection. Uses high-purity Li-NMC cells with a 12-month warranty. Charge voltage: 12.6V (±0.05V). Compatible with RC balance chargers supporting 3S Li-Ion profiles.
Which Devices Are Compatible with This Battery?
Optimized for DJI Mavic Pro, medical carts, cordless oscilloscopes, and DeWalt 12V tool adapters. Fits devices requiring 9V–12.6V input. Includes XT60 and JST-SM connectors. Not compatible with Li-Po-only chargers without voltage calibration. Avoid use in unmodified laptops or e-bikes due to BMS configuration differences. Always verify device voltage tolerances (±0.5V) before installation.
What Safety Features Does This Battery Include?
Multi-layer protection: PCM (Protection Circuit Module) with voltage balancing, temperature sensors, and redundant fuses. The casing uses UL94-V0 flame-retardant ABS. Passes UN38.3 transportation tests. Features a recovery mode for over-discharged cells (down to 2.5V). Safety vents prevent gas buildup. Annual failure rate: 0.03% in lab tests. Storage recommendation: 50% charge at 15°C–25°C in dry environments.
The battery’s smart BMS implements three-stage protection: primary MOSFET cutoff at voltage extremes, secondary chemical fuses for thermal events, and mechanical pressure relief diaphragms. Unlike cheaper alternatives, Tenergy’s system uses redundant voltage sampling with 1mV resolution across all cell groups. In overcurrent scenarios, the protection engages within 50 milliseconds – 40% faster than industry average. The flame-retardant housing can withstand 130°C for 15 minutes without deformation, meeting MIL-STD-810G shock/vibration standards.
How to Properly Charge and Maintain This Battery?
Use a 3S Li-Ion balance charger at 0.5C (3.9A max). Charge time: 2.5 hours. Never exceed 12.6V total voltage. Storage: 3.8V–3.85V per cell if unused for >1 month. Calibrate monthly by fully discharging to 9V (under load) then charging. Clean terminals with isopropyl alcohol. Avoid stacking during charging. Cycle efficiency drops below 80% after 800 cycles—replace when capacity falls under 70%.
What Environmental Impact Does This Battery Have?
Tenergy’s Li-Ion cells are RoHS-compliant and 91% recyclable. The company participates in Call2Recycle programs. Production uses 40% recycled cobalt. Carbon footprint: 8.2kg CO2 per battery (cradle-to-gate). End-of-life return programs offer 15% discount on replacements. Compared to lead-acid, reduces toxic waste by 98%. Avoid landfill disposal—lithium content requires specialized recycling.
Can This Battery Be Used in Extreme Temperatures?
Operational range: -20°C to 60°C. Below -10°C, capacity drops 25%—use self-heating pads. Above 45°C, cycle life degrades 30% faster. Not recommended for desert drones or Arctic surveys without thermal management. Internal resistance doubles at -15°C. For cold storage, wrap in neoprene. Never charge below 0°C—risk of lithium plating. Thermal cutoff activates at 70°C.
Expert Views
“Tenergy’s 7800mAh design sets a benchmark in safe energy density. Unlike pouch cells, their prismatic format resists swelling—critical for medical devices needing FAA compliance. The 15C burst rating allows unexpected load spikes, which we’ve validated in emergency ventilator deployments during power outages.”
— Dr. Elena Marquez, Power Systems Engineer, MedEquip Innovations
Conclusion
The Tenergy 11.1V 7800mAh Li-Ion Battery combines rugged reliability with cutting-edge safety features, making it a versatile choice across industries. Its balance of cycle life, energy density, and environmental compliance addresses both performance and regulatory needs. Proper maintenance ensures optimal longevity, while advanced protections mitigate risks in demanding applications.
FAQs
- How Long Does a Full Charge Last?
- Runtime depends on load: 45–60 mins in 100W drones, 8–10 hours in portable oxygen concentrators (20W draw).
- Is This Battery Airline-Approved?
- Yes—IATA-compliant under “Section II” for ≤100Wh batteries. Carry-on only. Include original packaging with rating labels.
- Can I Repair a Swollen Battery?
- No—swelling indicates cell degradation. Immediately discontinue use and recycle. Tenergy’s warranty covers swelling within 6 months.