21700 3.7V 4000-5000mAh NCM Li-ion Battery

High Rate High Performance Rechargeable Lithium Ion Cylinder

$5.00

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Key Features:

Voltage: Nominal 3.7V (range 2.75-4.2V), compatible with most 3.6V/3.7V Li-ion devices
NCM Cathode: Energy density 204-300 Wh/kg, 557 Wh/L, enabling compact lightweight designs
Charge-Discharge: 0.7-3.0C charge, 3.0-10C discharge; internal resistance <12-20mΩ, low energy loss
Operating Temp: -20℃~60℃ (discharge), 0℃~45℃ (charge), adaptable to harsh environments
Cycle Life: ≥700-800 cycles (0.5C), ≥80% capacity retention, reducing replacement cost

Core Advantages:

Energy Efficiency: 204-300 Wh/kg high energy density, optimized production for cost advantage and stable low-loss output
Factory-Scale Scalability: Full-automatic lines support large-scale mass production, stable supply for bulk OEM/ODM orders with consistent quality
Reliable Safety: Multi-protection design, ≤55℃ at 10C discharge, compliant with UN38.3, IEC62133 and other international standards
Strong Compatibility: Standard 21mm×70mm size, supports series/parallel connection for custom packs without structural modification
Eco & Durable: RoHS-compliant, heavy metal-free, ≥700-800 cycles life, conforms to global environmental standards

Rechargeable Cylindrical Battery structure drawing

Applications:

Automotive: EVs, hybrid vehicles, e-scooters, e-bikes
Energy Storage: Residential/commercial ESS, solar/wind backup, UPS, portable power stations
Industrial Tools: Cordless drills, saws, grinders
Consumer Electronics: High-performance flashlights, portable speakers, gaming devices, portable medical monitors
Aerospace & UAVs: Drones (environmental monitoring), lightweight aerospace devices

core advantages about cylindrical battery

This is a next-generation cylindrical lithium-ion battery cell adopting a high-purity NCM cathode. It boasts a standard 21mm×70mm dimension, which achieves an optimal balance among capacity, power output and thermal management performance. This product is well-suited for high-performance application scenarios including the automotive, energy storage and industrial sectors.