21700 4000mAh 3.7V Lithium Battery

• Type: Li-ion Battery
• Cathode Material: NCM
• Rechargeable: Yes
• Size: 21*70mm
• Voltage: 3.7V
• Lead Time: 15-20 Days
• Model NO.: 21700-4000mah
• Certification: CE/RoHS/Un38.3/MSDS/Bis
• Warranty: 1 Year
• Transport Package: Un Carton
• Specification: 4000mAh
• Trademark: EVERBEST
• Origin: China
• HS Code: 8506500000
• Production Capacity: 1000000PCS/Day

Product Description

21700 4000mah 3.7v lithium battery BIS
 

Product Description

Item	Specification	Remark
Rated Charge	Limiting 6A and Constant 4.2V Charge for 100mA Cut off
Rated Discharge	Constant 10A Discharge until 2.5V at 23°C
Nominal Capacity	4000mAh	0.2C Rate Discharge Capacity
Minimum Capacity	3900mAh	2.5C Rate Discharge Capacity
Nominal Voltage	3.6V
Internal Impedance	≤ 15mΩ	Real Value About 12-13mΩ By AC 1kHz
Weight	70g Max
End of Charge Voltage	4.20± 0.05V
End of Discharge Voltage	2.5V
Charging Time	180 min	Standard charge,  200mA cut-off
	70min	Rated charge, 100mA cut-off
Maximum Charging Current	6A	Continuous Charge
Maximum Discharging Current	35A	Without Temperature Cut
	45A	With 80ºC Temperature Cut
Operating Temperature	0~45°C	Charging
	-20~60°C	Disharging
Storage Temperature	< 35°C	Recommended<23°C for Long Term Storage

Detailed Photos

Application

Certifications

 

 

Company Profile

Everbest is a company specializing in R&D and production of lithium batteries, including its own cell factory, battery assembly factory and BMS center. The quality is stable, the price is very cost-effective, and it has been widely praised in the market. Products are widely used in solar street lights, base stations, household and commercial solar systems, electric vehicles and other electric transport vehicles. We can also provide customize services and have many successful cases.

 

 Currently our best-selling lithium battery cells are 18650 2600mah-3500mah, 21700 4000-5000mah, 32700 3.2v 6000mah and some high rate 8-15C 18650 and 21700 for electric tools.

Hot-sell battery pack items are deep cycle lithium batteries 12V, 24V 50-400AH which can directly replace lead-acid batteries, and rack-mounted batteries 48V 100AH.

We have strong technical force and advanced equipment. Our factories passed ISO9001 quality system certification, ISO14001 environmental system certification and ISO18001 health system certification; our products have passed the EU CE , ROHS, IEC certification, and form long-term strategic partnerships with power companies, photovoltaic energy storage companies, State Grid, China Southern Power Grid, products are exported to 50 countries and regions in the Americas, Europe, Oceania, the Middle East, Africa, Southeast Asia,  gained a great reputation at home and abroad.