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21700 4000mAh 40A High Rate Rechargeable Battery with 300 Cycles

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21700 4000mAh 40A High Rate Rechargeable Battery with 300 Cycles

Brand Name : OiD

Model Number : INR21700N40A40

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

Place of Origin : China

MOQ : 100pcs

Price : $0.5 ~ $100.0 / pcs

Delivery Time : 3 ~ 7 days for storage

Payment Terms : TT,L/C,Western Union

Name : 40A Battery

ODM : Free custom design for packs

Battery Type : 4000mAh Rechargeable

Cathode : NCM or NMC

Higher Energy Density : LongerrRuntime for 20-30% more energy than 18650 cells

Superior Power Output : Higher discharge rates (up to 40A)

Cost-Effective & Space-Saving : Reduce pack weight and cost by requiring fewer cells in series and parallel

Future-Proof : Ensure compatibility with next-gen tech for high-demand applications

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INR21700N40A40 3.7V 4000mAh 40A 300 Cycles 21700 Battery

Product Name

INR21700-4000-3.7 21700 Battery

Advantages

  • High energy density and long cycle life
  • Superior high-rate discharge capability for demanding applications
  • Enhanced safety and thermal stability
  • Certified for compliance with international standards

Specifications

Parameter

Value

Model

INR21700N40A40

Nominal Voltage

3.7V

Nominal Capacity

4000mAh

Charging Voltage

4.20V ± 0.05V

Discharge Cut-off Voltage

2.50V

Max Charging Current

6.0A

Max Continuous Discharge Current

40A

Weight

≤68.0g

Dimensions

Diameter: ≤21.30mm, Height: ≤70.40mm

Internal Resistance

≤15mΩ

Energy Density

Volume: 590Wh/L, Weight: 218Wh/kg

Terminal Type

Standard 21700 flat top or button top (customizable)

Cycle Life

Condition

Cycles

Capacity Retention

4A Charge / 20A Discharge

300

≥60%

4A Charge / 30A Discharge

200

≥60%

Discharge Curve

21700 4000mAh 40A High Rate Rechargeable Battery with 300 Cycles

Operating Temperature Range

Condition

Temperature Range

Charging

0°C to 50°C

Discharging

-20°C to 75°C

Storage

-20°C to 45°C (recommended for long-term storage)

Certifications

  • BIS, KC, BSMI, CB, UL, CCC

Key Features

  • High discharge rate up to 40A
  • Excellent thermal stability and safety
  • Long cycle life with minimal capacity degradation
  • Environmentally friendly and RoHS compliant

Applications

  • Electric tools (e.g., drills, saws)
  • Floor cleaning machines (e.g., scrubbers, sweepers)
  • Vacuum cleaners
  • High-power portable devices

21700 4000mAh 40A High Rate Rechargeable Battery with 300 Cycles

Usage Warnings & Precautions

  • Use only with compatible chargers and devices.
  • Avoid short-circuiting, overcharging, or over-discharging.
  • Do not expose to high temperatures, fire, or water.
  • Keep away from children and pets.

Storage Guidelines

  • Store at 20±5°C with 50% SOC for optimal performance.
  • Avoid storing in high humidity or extreme temperatures.
  • Recharge every 6 months if stored for extended periods.

Warranty & Disclaimer

  • 12-month limited warranty from the date of purchase.
  • Warranty does not cover damage due to misuse, improper charging, or unauthorized modifications.
  • Manufacturer is not liable for accidents caused by improper use.


Product Tags:

300 Cycles 40A Battery

      

40A Battery Customized

      

3.7 V 4000mAh Battery High Rate

      
Quality 21700 4000mAh 40A High Rate Rechargeable Battery with 300 Cycles for sale

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