Ampace INR21700 JP40 is a high-power 21700 lithium cell with nominal 3.7V and 4000mAh capacity. This 21700 battery achieves stable 15C continuous discharge and 35C peak discharge, featuring ultra-low internal resistance ≤4mΩ. The 21700 cell delivers excellent pulse performance and maintains consistent output over 600 cycles. Standard cylindrical size facilitates flexible battery pack assembly. This Ampace 21700 cell is widely adopted for RC models, power tools and high-current portable devices, available for bulk wholesale.
1. Cell Specifications
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Battery Model
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INR21700-JP40
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Battery Type
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Cylindrical 21700 battery
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Nominal Voltage
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3.7V
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Nominal Capacity
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4000mAh
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Charge Voltage
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4.2V
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Discharge Cut-off Voltage
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2.5V
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Max Charge Current
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2C
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Max Discharge Current
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15C
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Peak Discharge Current
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35C
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Internal Resistance
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≤4mΩ
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Charge Temperature
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-10-60℃
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Discharge Temperature
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-30-75℃
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Storage Temperature
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0~45℃
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Cycle Life
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≥600 cycles
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Battery Size
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φ21.31*70.42mm
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Battery Weight
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About 70g
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Warranty
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2 Years
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2. Who is Ampace?
Ampace Technology is a Chinese lithium battery technology company focused on advanced lithium-ion battery cells, battery packs, and energy storage solutions. It was established as a joint venture between Contemporary Amperex Technology Limited (CATL) and Amperex Technology Limited (ATL), combining CATL’s power battery expertise with ATL’s consumer battery technology background.
Strong CATL + ATL Background
Ampace benefits from CATL’s large-scale manufacturing experience and ATL’s consumer lithium battery know-how.
Focus on High-End Lithium Cells
The company emphasizes:High safety, Long cycle, life High energy density, Fast charging capability
Growing Global Presence
Ampace states that its products are supplied globally, covering energy storage, drones, power tools, and smart mobility markets.
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: How do you ensure cylindrical cell quality?
A: Quality is controlled through Grade A cell selection, capacity testing, internal resistance testing, strict sorting, and batch consistency inspection.
Q: What industries use cylindrical battery cells?
A: Cylindrical cells are used across EVs, consumer electronics, industrial equipment, robotics, medical devices, power tools, and renewable energy systems.
Q: What is the difference between high-energy and high-power cylindrical cells?
A: High-energy cells focus on longer runtime and higher capacity, while high-power cells are optimized for fast discharge and demanding applications.
Q: Are cylindrical cells environmentally friendly?
A: Lithium-ion cylindrical cells support clean energy applications by enabling electric transportation and renewable energy storage. Responsible recycling helps reduce environmental impact.
Q: How should cylindrical cells be stored?
A: Cylindrical cells should be stored in a dry, cool environment at partial charge levels, avoiding high temperatures and direct sunlight.
Contact us: Wechat/WhatsApp: +8613528488114 Email: sales@nogibattery.com 
