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600 Cycles 3.6 Volt Battery 40A Discharge 4000mAh 21700 Battery High Capacity

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600 Cycles 3.6 Volt Battery 40A Discharge 4000mAh 21700 Battery High Capacity

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Brand Name :OiD
Model Number :INR21700L40A40
Certification :BIS, KC, BSMI, CB, UL, CCC
Place of Origin :China
MOQ :100pcs
Name :3.6 Volt Battery
Battery Type :3.6V 4000mAh Rechargeable
ODM :Free custom design for packs
Positive Electrode Material :NCA (Nickel Cobalt Aluminum)
Cycle Life :600+ cycles
Charging/ Discharging :8A/40A
Operating Temperature :-40°C~60°C
High energy density :209Wh/kg
Price :$0.5 ~ $100.0 / pcs
Delivery Time :3 ~ 7 days for storage
Payment Terms :TT, L/C, Western Union
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INR21700L40A40 3.6V 4000mAh 40A Discharge 600 Cycles 21700 Battery

Product Name:
INR21700L40A40 21700 Battery

Advantages:

  • High capacity for extended runtime
  • Superior performance in low-temperature environments
  • Long cycle life with reliable capacity retention
  • Certified for safety and quality assurance

Specifications:

Parameter

Value

Model

INR21700L40A40

Nominal Voltage

3.6V

Nominal Capacity

4000mAh

Positive Electrode Material

NCA (Nickel Cobalt Aluminum)

Negative Electrode Material

Graphite + Silicon

Dimensions (Diameter x Height)

≤21.30 mm x ≤70.40 mm

Weight

≤69.0g

Volume Energy Density

574 Wh/L

Weight Energy Density

209 Wh/kg

Internal Resistance

≤13mΩ

Charging Cut-off Voltage

4.20V ± 0.05V

Discharge Cut-off Voltage

2.50V

Maximum Charging Current

8.0A

Maximum Continuous Discharge Current

40A

Terminal Type

Standard 21700 Flat Top

Cycle Life:

Test Condition

Performance

4A Charge / 4A Discharge

600 cycles, capacity retention ≥60%

6A Charge / 10A Discharge

400 cycles, capacity retention ≥50%

Discharge Curve:
600 Cycles 3.6 Volt Battery 40A Discharge 4000mAh 21700 Battery High Capacity

Operating Temperature Range:

Parameter

Range

Charging Temperature

0°C to 50°C

Discharging Temperature

-40°C to 75°C

Certifications:
BIS, KC, BSMI, CB, UL, CCC

Key Features:

  • High capacity for extended runtime
  • Low internal resistance for efficient power delivery
  • Suitable for extreme temperature environments
  • Certified for global safety standards

Applications:

  • Electric vehicles and hybrid vehicles
  • Power tools and industrial equipment
  • Portable medical devices
  • Energy storage systems (ESS)
  • Emergency lighting and backup power

600 Cycles 3.6 Volt Battery 40A Discharge 4000mAh 21700 Battery High Capacity

Usage Warnings & Precautions:

  • Avoid overcharging or over-discharging the battery.
  • Do not expose the battery to high temperatures or direct sunlight.
  • Use only compatible chargers and devices.
  • Keep away from children and flammable materials.

Storage Guidelines:

  • Store in a cool, dry place at 20°C to 25°C.
  • Maintain a charge level of 30% to 50% for long-term storage.
  • Avoid storing in fully charged or fully discharged states.

Warranty & Disclaimer:
This product is covered by a limited warranty against manufacturing defects. The warranty does not cover damage caused by misuse, improper handling, or unauthorized modifications. Always follow the manufacturer’s guidelines for safe and optimal use.

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