3.6V 4000mAh 21700 Battery 40A Discharge 600 Cycles NCA

Price Negotiable

Price: $0.5 ~ $100.0 / pcs

MOQ: 100pcs

Delivery Time: 3 ~ 7 days for storage

Brand: OiD

Product Description

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:

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

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.