Ncm 21700 4000mAh Energy High Density Lithium Battery Cell for Energy System

• Customization: Available
• Type: Li-ion Battery
• Cathode Material: NCM
• Model NO.: INR21700-4000
• Rechargeable: Yes
• Size: Small
• Nominal Voltage: 3.7
• Nominal Capacity: 4000mAh
• Cycle Life: ≥350 Cycles (≥80% Capacity Retention)
• Std. Charge: 0.2c Cc to 4.2V, Then CV to ≤0.02c
• Std. Discharge: 0.2c Cc to 2.75V
• Voltage Range: 2.75V - 4.2V
• Cell Weight: 66.2±2g
• Cell Dim. (Height): 70.9mm (±0.1mm)
• Cell Dim. (Diameter): 21.75mm (±0.2mm)
• Storage Type: (<1 Yr): -20-25ºC/(<3 Mo): -20-45ºC
• Charge Temp. (0-15ºC): 0.2
• Charge Temp. (15-50ºC): 0.5c
• Discharge Temp. (-20-0ºC): 0.2c
• Discharge Temp. (0-45ºC): 0.5c
• Transport Package: Box
• Specification: 100/Box 400/Carton
• Trademark: NU
• Origin: China
• Production Capacity: 1400000000pices/Year

Product Description

Product Parameters

 

Model Number	INR21700-4000
Cathode Material	NCM
Nominal Voltage	3.7V
Nominal Capacity	4000mAh
Energy Density	223.56Wh/kg
Cycle Life	≥80% of initial capacity after 350 cycles (under specified conditions).
Standard Charge	0.2C CC (constant current) to 4.2V, then CV (constant voltage 4.2V) until current declines to ≤0.02C
Standard Discharge	Constant current 0.2C, end voltage 2.75V
Charge Cut-off Voltage	4.2V
Discharge Cut-off Voltage	2.75V
Cell Weight	66.2g (±2g)
Cell Dimension (Height)	70.9mm (±0.1mm)
Cell Dimension (Diameter)	21.75mm (±0.2mm)
Storage Type	Less than 1 year: -20-25ºC less than 3 months: -20-45ºC
Charging Temp & Rate	0~15ºC: 0.2C 15~50ºC: 0.5C
Discharging Temp & Rate	Overall range: -20 ~ 60ºC -20-0ºC: 0.2C 0-60ºC: 0.5C

Company Profile

Production Process

Product Description

Production Series

Certifications

Packaging & Shipping

FAQ

Q1: Are you a factory? 
A: Yes, absolutely! We are a professional battery production factory, and we also have our own PACK assembly plant. Our main factories are located in Jiangxi and Guangxi, China. We are very much looking forward to your visit to our factory!

Q2: How can I get the price? 
A: We usually quote within 24 hours after receiving your inquiry. If you urgently need a quote, please call us or inform us in your email so that we can prioritize your inquiry.

Q3: How can I get a sample to check your quality?
A: After price confirmation, you can request samples to check our quality.

Q4: What about the lead time? 
A: For batteries we have in stock, shipment can usually be arranged after 5-7 working days of strict product testing. For batteries not in stock or custom-made, we will need some time for production, and the shipping time depends on the low and peak seasons.

Q5: What are your payment terms? 
A: We accept Telegraphic Transfer (T/T) and Letter of Credit (L/C).