26650 6.4V 3200mAh Special Lithium Battery

Technical parameters and characteristics
Basic configuration
Voltage and capacity It is composed of two 26650 3.2V 3200mAh lithium iron phosphate single cells connected in series, with a nominal voltage of 6.4V, a capacity of 3200mAh, an energy of approximately 20.48Wh, an internal resistance of ≤50mΩ (AC 1kHz, including protection circuit), a cycle life of ≥2000 times (1C charge and discharge, capacity retention rate ≥80%).
Physical characteristics: The dimensions are 26mm in diameter × 65mm in length ×2 sections connected in series, with a weight of approximately 180-220g. Customized packaging is supported (such as steel shell cylinders, built-in protection plates, and heat dissipation modules).
Charging and discharging performance: Supports 1C standard charging and discharging (3.2A charging /3.2A discharging), maximum continuous discharge current 9.6A (3C), pulse discharge current 15A (5 seconds), stable voltage platform (3.2-3.3V fluctuation < 5mV), self-discharge rate < 3% per month.
Temperature adaptability: Operating temperature -20℃ to 60℃, storage temperature -20℃ to 45℃. At low temperatures of -20℃, the capacity retention rate is ≥60%. At high temperatures of 60℃, it is necessary to avoid full charge storage.


Materials and Structures
Cathode material: Lithium iron phosphate (LiFePO₄), with a stable crystal structure, a thermal decomposition temperature above 600℃, and no risk of thermal runaway. Nano-modification process is adopted to enhance ionic conductivity.
Negative electrode and electrolyte: Graphite negative electrode + composite carbon coating, electrolyte is organic solvent + lithium salt, separator is polyolefin porous membrane, supporting rapid ion transport.
Packaging design: Steel shell compressive strength ≥300kgf, built-in safety valve for explosion-proof, supports flat head/pointed head design (pointed head with protective plate), compatible with standard 26650 battery compartment.


Core advantage
Safety
It has passed the needle-puncture, compression and overcharge tests without combustion or explosion, and complies with international safety standards such as UN38.3, IEC62133, CE and RoHS. It has no memory effect and a low self-discharge rate.
Durability
It has a long cycle life (≥2000 times), which is 4 to 8 times that of lead-acid batteries. High-temperature resistant (operating at -20℃ to 75℃), with optimized low-temperature performance (3C discharge capacity at -20℃ ≥70%).
Performance
The energy density is approximately 120-150Wh/kg, and the voltage platform is stable, making it suitable for scenarios that require stable output (such as energy storage systems and medical equipment).


Application scenarios
Energy storage systems: home energy storage, solar/wind energy storage, UPS backup power supply, communication base stations.
Power and Tools: Electric bicycles, electric motorcycles, electric drills, electric saws, electric screwdrivers, AGVs (Automated Guided Vehicles).
Lighting and equipment: High-intensity flashlights, solar street lamps, portable medical devices (such as defibrillators, ventilators), military equipment (such as individual soldier communication equipment).
Special scenarios: Outdoor adventure equipment, ship/railway transportation, emergency power supply (fire/rescue).