What Certifications and Safety Standards Do Ufine Battery's Li-ion 21700 Batteries Meet?

Our Li-ion 21700 Batteries comply with industry standards and may have certifications such as UL, CE, or RoHS, depending on the application.

Can Ufine Battery provide custom 21700 battery packs?

Yes. Ufine Battery supports OEM & ODM customization services, including custom voltage, capacity, PCM/BMS protection, connectors, wires, and battery pack configurations.

How long does an 21700 battery last?

The lifespan of an 21700 battery depends on usage conditions, charging methods, and operating environment. Under proper use, many 18650 batteries can achieve hundreds of charge cycles.

How should 21700 lithium batteries be stored?

21700 batteries should be stored in a cool, dry environment away from direct sunlight, high temperatures, and moisture. Partial charge storage is recommended for long-term preservation.

Rechargeable 21700 Lithium Cell 3.6V 5000mAh for Power Tools

Name: Rechargeable 21700 Lithium Cell 3.6V 5000mAh for Power Tools
Brand: Guangdong Ufine New Energy Co., Ltd
SKU: 2297247765

Guangdong, ChinaGuangdong Ufine New Energy Co., Ltd

US$5.00

5-2,999 Pieces

US$4.50

3,000-9,999 Pieces

US$4.20

10,000+ Pieces

Sample price:US$5.00/piece.Request sample

Product profile

Customization

Available

Type

Li-ion Battery

Cathode Material

NCM

Model NO.

21700

Rechargeable

Yes

Size

Standard

Capacity

5000mAh

Nominal Voltage

3.7V

Charging Voltage

4.2V

Charging Temperature

0~50°C

Discharging Temperature

-20~80°C

Cycle Life

300 Cycles

Weight

69g

Battery Type

21700 Lithium Battery

Transport Package

410*255*230mm

Specification

21x70mm

Trademark

N/A

Origin

China

HS Code

8507600090

Production Capacity

500000000

Key features

The standard 21700 cylindrical battery design delivers strong power output while maintaining a compact structure, making it ideal for portable electronic devices and space-limited applications.

Engineered with optimized electrode structures and high-quality separator materials to improve battery efficiency, cycle life, and long-term stability.

Built with reliable protection mechanisms against overcharge, over-discharge, overcurrent, and short circuits, helping ensure safer operation for both the battery and connected devices.

Multiple voltage options are available in 3.7V, 12V, 18V, 36V, 48V, 60V, and 72V configurations to suit different applications.

Suitable for various applications including flashlights, laptops, power tools, medical devices, energy storage systems, and electric vehicles.

Supports stable charging and discharging performance across a wide operating temperature range, making it suitable for different climates and demanding environments.

Designed for repeated charge and discharge cycles, reducing replacement frequency and lowering long-term operating costs while supporting environmentally friendly energy solutions.

Factory direct pricing offers competitive rates for bulk orders with OEM/ODM support.

Company profile

Management CertificationProduct CertificationR&D CapabilitiesQuality Assurance

Guangdong Ufine New Energy Co., Ltd

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 4 Years CertifiedNearest Port: Guangzhou Port, Shenzhen PortAverage Response Time: ≤1.53h

About Our Factory & Business Background

AddressBuilding 41, Sunac Zhimei Industrial Valley, Siqian Town, Xinhui District, Jiangmen, Guangdong, China

Plant Area11786 square meters

Number of Employees238

Registered Capital30,000,000 RMB

Terms of PaymentT/T, PayPal, D/P, Western Union

International Commercial Terms(Incoterms)EXW, CFR, CIF, FOB

Average Lead TimePeak Season Lead Time: within 15 workdays Off Season Lead Time: within 15 workdays

Minimum Order Quantity1

Supply Chain Partners27

Our Production Capability & Technical Expertise

Main ProductsLithium Polymer Battery, Lithium Battery Pack, Low Temperature Battery

Production Lines10

Production MachinesCapacity Cabinet, Coating Machine, Forming Cabinet, Fully Automatic Liquid Injection Machine, Fully Automatic Winding Machine, High Vacuum Oven, Roller Machine, Sheet Processing Machine, Top-side Sealed All-in-one Machine, XRAY Machine, Automatic Sorting Machine, CCD Testing Machine, Thickness Tester, Density Testing Instrument, Diaphragm Permeability Tester, Digital Comprehensive Tester, Draught Drying Cabinet, RoHS Tester, Temperature and Humidity Chamber

QA/QC inspectors12 people

Inspection Type for Finished Products100% inspection(Visual inspection & Function inspection)

Inspection Method for Finished ProductsHave instructions and uniformly followed

R&D Engineers19 people

Traceability of Raw MaterialsYes

Our Industry Experience & Global Business Record

Year of Establishment2019-12-12

Main MarketsNorth America, Europe, East Asia(Japan/ South Korea), Domestic

Repeat Buyers Choice50%~80%

Number of Foreign Trading Staff9

Overseas Agent/BranchNo

New Products Launched in Last yearNo

Our Certifications, Standards & Industry Recognition

Management System CertificationISO9001:2015, ISO45001:2018, ISO14001

Product CertificationCE, CCC, UL, RoHS, FCC, Others

Cooperated with Fortune 500No

Product Q&A

Q:Can I get samples of lithium batteries before placing a bulk order?

Yes, many suppliers offer samples of lithium batteries for testing and evaluation purposes. However, there are costs associated with obtaining samples, including sample fees and freight charges.

Q:What is the delivery time after placing an order with Ufine Battery?

Normally, it takes 10 to 12 days for air transportation, and more than 45 days for sea transportation.

Q:How long does it take to make a sample of a custom battery?

It takes 1~3 days to make regular samples, and 7~10 days to make handmade samples. The time required increases with the number of samples.

Q:Can Li-ion 21700 batteries be used in series or parallel configurations for increased capacity or voltage?

Yes, our Li-ion 21700 Batteries are designed for easy integration into series or parallel configurations to meet specific power requirements.

Q:How does the thermal performance of Li-ion 21700 Batteries compare to other battery types?

Li-ion 21700 Batteries have efficient thermal management systems, ensuring stable performance even under challenging temperature conditions.