Grade A Svolt 21700 battery cell 3.7V 4400mAh rechargeable lithium ion battery with wholesale price
Grade A Svolt INR21700-44F is a reliable rechargeable 21700 battery cell with nominal voltage 3.7V and 4400mAh capacity. This svolt 21700 cell works as stable 21700 lithium ion battery, supporting 1C continuous discharge and 3C peak discharge, with cycle life reaching over 800 times. Featuring consistent performance and low internal resistance, this 21700 battery lithium ion delivers excellent cell matching for pack assembly. With dimensions φ21.6*71.2mm, it is widely used for portable power devices and light mobility equipment. We provide genuine cells with favorable wholesale price for global battery manufacturers.
1. Cell Specifications
|
Battery Model
|
INR21700-44F
|
|
Battery Type
|
Cylindrical 21700 Cell
|
|
Nominal Voltage
|
3.7V
|
|
Nominal Capacity
|
4400mAh
|
|
Charge Voltage
|
4.2V
|
|
Discharge Cut-off Voltage
|
2.75V
|
|
Max Charge Current
|
1C
|
|
Max Dicharge Current
|
1C
|
|
Peak Discharge Current
|
3C
|
|
Internal Resistance
|
≤20mΩ
|
|
Charge Temperature
|
0℃~45℃
|
|
Discharge Temperature
|
-20℃~60℃
|
|
Storage Temperature
|
-20~45℃
|
|
Cycle Life
|
≥800 cycles
|
|
Battery Size
|
φ21.6*71.2mm
|
|
Battery Weight
|
67.5g
|
|
Warranty
|
2 Years
|
2. Why Cylindrical Cells？
Cylindrical lithium-ion cells remain a competitive mainstream format thanks to robust mechanical structure, mature automated manufacturing, outstanding cell consistency and inherent cooling channels after packaging.
Enhanced Structural Safety
Cylindrical lithium-ion cells adopt spiral winding construction. The round shape evenly distributes internal pressure, and rigid metal casing accommodates built-in PTC and CID safety devices to prevent deformation and overheating.
Consistent Performance & Scalable Production
Standard sizes including 18650, 21700 and 4680 etc enable fully automated manufacturing. Superior cell consistency optimises the reliability of battery modules and packs.
Efficient Thermal Management for High-Rate Operation
Natural gaps between cells form cooling channels after assembly, effectively mitigating hot spots under high-rate charging and discharging conditions.
Flexible Modular Integration
Adjustable series-parallel configurations support custom battery pack designs for electric vehicles, e-bikes, power tools and stationary energy storage systems.
Controllable Thermal Propagation Risk
Individual cells carry moderate capacity. Energy released during failure is limited, making thermal runaway easier to contain than large-format prismatic cells.
3. Customer Review3. Customer Review
Every acknowledgment from clients fuels NOGIBattery's development. Our team stays dedicated to supplying dependable lithium cells for all partners.
4. Customer FAQ
Q: What does internal resistance mean for cylindrical cells?
A: Internal resistance affects efficiency, heat generation, and discharge performance. Lower internal resistance helps improve power output, thermal performance, and overall battery efficiency.
Q: Why choose cylindrical cells instead of traditional battery solutions?
A: Cylindrical cells provide higher energy efficiency, longer lifespan, better reliability, and more flexible design options for modern battery applications.
Q: What applications use cylindrical battery cells?
A: Cylindrical cells are widely used in electric vehicles, e-bikes, scooters, power tools, drones, robots, solar storage systems, and portable power stations.
Q: Can cylindrical cells support high-rate discharge?
A: Yes. Many cylindrical cells are designed for high-power applications with low internal resistance and excellent discharge performance.
Q: Can cylindrical cells be customized for battery packs?
A: Yes. Cylindrical cells support flexible series-parallel matching. We can customize battery packs in target voltage and capacity to fit e-bikes, electric scooters and energy storage equipment. Custom connectors, housings and BMS solutions are also available upon request.
Contact us: Wechat/WhatsApp: +8613528488114 Email: sales@nogibattery.com
