Is it OK to print my logo on Battery?

Yes. Please inform us formally before our production and confirm the design firstly based on our sample.

Do you offer guarantee for the products?

Yes, we offer a one-year warranty to the Li-ion battery products.

How to deal with the faulty?

Firstly, our batteries are produced in strict quality control system and the defective rate will be less than 0.2%. Secondly, during the guarantee period, we will send new batteries with new order for small quantity. For defective batch products, we will repair them and resend them to you or we can discuss the solution including re-call according to real situation.

High-Capacity 21700 Li-ion Battery Cell for Power Banks

Name: High-Capacity 21700 Li-ion Battery Cell for Power Banks
Brand: Howell Energy Co., Ltd.
SKU: 1956669361

Guangdong, ChinaHowell Energy Co., Ltd.

US$1.20-2.15

1,000 Pieces

Sample price:US$2.20/piece.Request sample

Product profile

Customization

Available

Type

Li-ion Battery

Cathode Material

NCM

Model NO.

21700 3.7V 5000mAh

Rechargeable

Yes

Size

Small

Weight

68g

Max Charge Voltage

4.2V

Max Discharge Voltage

2.75V

Standard Charge

0.2c

Standard Discharge

0.2c

Maximum Continuous Charge Current

1.0c

Maximum Continuous Discharge Current

1.5c

Charge Temperature

0~45 Degree

Discharge Temperature

-20~60 Degree

Storage Temperature

-20~40 Degree

Cycle Life

>800 Cycles

Certificate

CE/RoHS/UL/IEC/CB/Bis/Un38.3/MSDS

Transport Package

130 Per Carton

Specification

21.5*70mm

Trademark

OEM

Origin

China

HS Code

8507600090

Production Capacity

1000000PCS Per Day

Key features

High Energy Density: NCM cathode material provides higher specific energy and voltage compared to NiMH.

Long Cycle Life: Expected cycle life exceeds 1000 cycles with stable performance over time.

Low Self-Discharge: Retains charge well with less than 3% monthly self-discharge rate.

Multiple Certifications: Complies with CE, UL, RoHS, UN38.3, IEC62133, BIS, and MSDS standards.

Flexible Customization: Supports full customization, minor customization, and design-based options.

Versatile Applications: Suitable for power banks, e-bikes, solar systems, medical devices, and more.

Safe Storage: Can remain in storage for 12 months without requiring maintenance.

Company profile

100% Finished Products InspectionStandardized quality controlFull CustomizationManagement Certification

Howell Energy Co., Ltd.

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 15 Years CertifiedNearest Port: Shenzhen Port, Hong Kong PortAverage Response Time: ≤4.64h CertifiedTerms of Payment: LC, T/T, PayPal, etc.

About Our Factory & Business Background

AddressB1010, Genzon Times Square, Longgang, Shenzhen, Guangdong, China

Plant Area2329 square meters

Registered Capital12,500,000 RMB

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

Average Lead TimePeak Season Lead Time: one month Off Season Lead Time: one month

Minimum Order Quantity1 Pc

Supply Chain Partners30

Our Production Capability & Technical Expertise

Main ProductsLiFePO4 Battery, Li-ion Battery, Solar Energy Storage Battery, RV/Electric Vehicle Battery, Solar Battery, Customized Battery Pack, UPS Battery, Solar Street Light Battery, Battery Pack, Motorcycle Battery

Production Lines6

Production MachinesAutomatic production line, Battery sorting machine, Heat shrink film machine, Coding machine, Aging rack, Battery detection system, Lithium batteny pack equalization repair analyze, Lithium battery pack intelligent charger, Lithium battery protection board tester, Battery comprehensive tester, High performance battery testing system, Battery heavy impact tester, Battery needle punching and extrusion integrated machine, Programmable constant temperature and humidity chamber

QA/QC inspectors3 people

Inspection Type for Finished Products100% inspection(Visual inspection)

Inspection Method for Finished ProductsHave instructions and uniformly followed

R&D Engineers3 people

Traceability of Raw MaterialsYes

Test Reports for Raw MaterialsUL, Others

Our Industry Experience & Global Business Record

Year of Establishment2010-11-24

Main MarketsEurope, Domestic

Repeat Buyers Choice30%~50%

Number of Foreign Trading Staff15

Overseas Agent/BranchNo

New Products Launched in Last yearYes

Our Certifications, Standards & Industry Recognition

Management System CertificationISO9001:2015

Product CertificationCE, Others

Cooperated with Fortune 500No

Product Q&A

Q:Can I have a sample order for Battery?

Yes, we welcome sample order to test and check quality.

Q:What about the lead time?

Samples in 5~10 days, 25-30 days for the bulk order.

Q:Do you have any MOQ limit for Battery?

Low MOQ, 1pc for sample checking is available.

Q:How do you ship the goods and how long does it take to arrive?

For sample order, we usually ship by TNT, UPS etc., which usually takes 3~5 days to arrive. For the bulk order, Air and sea shipping are both optional.

Q:How to proceed an order for Battery?

Firstly let us know your technical requirements and application. Secondly we quote accordingly. Thirdly customer confirms the samples and places deposit for formal order. Fourthly we arrange the production.