What is the warranty period?

The standard warranty period is 1 year.

Do you provide quality inspection?

Yes, we perform 100% visual and functional inspection on all finished products.

3.6V 21700 4000mAh Cylindrical Lithium Ion Battery for Power Tools

Name: 3.6V 21700 4000mAh Cylindrical Lithium Ion Battery for Power Tools
Brand: Shenzhen Eastar Energy Co., Ltd.
SKU: 2313025815

Guangdong, ChinaShenzhen Eastar Energy Co., Ltd.

US$1.55

1,000-9,999 Pieces

US$1.47

10,000+ Pieces

Sample price:US$10.00/piece.Request sample

Product profile

Customization

Available

Type

Li-ion Battery

Cathode Material

LFP

Model NO.

21700 battery

Rechargeable

Size

Small

Voltage

3.7V

Warranty

1 Years

Certification

CE/RoHS/Un38.3/MSDS

Model No.

21700

Cell Type

Grade a Cells

Electrolyte

Li-ion

Discharge Cut-off Voltage

Floor Mounted, Vertical Moveable

Keywords

Lithium Ion Battery

Usage

LED Bulb, Remote Control Boat, Remote Control Plan

Transport Package

Carton Box

Specification

21*70mm

Trademark

Eastar/OEM

Origin

China

Key features

High Energy Density: 223.56Wh/kg for superior power storage in compact size.

Long Cycle Life: Over 800 cycles with at least 80% capacity retention.

Comprehensive Certifications: CE, RoHS, UN38.3, and MSDS certified for global safety standards.

Flexible Customization: Offers full, minor, and sample-based customization options.

Grade A Cells: Constructed with high-quality Grade A lithium-ion cells.

ISO 9001 Certified: Manufactured in ISO 9001 certified facilities ensuring quality.

Fast Off-Season Delivery: Lead time within 15 workdays during off-peak seasons.

OEM/ODM Services: Full OEM and ODM services available for brand customization.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceStandardized quality control100% Finished Products Inspection

Shenzhen Eastar Energy Co., Ltd.

Guangdong, China

Business Type: Manufacturer/Factory CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc.Export Year: 2006-06-07Nearest Port: SEHZNHEN, NANSHAAverage Response Time: ≤7.37h

AI-Powered supplier vetting

SummaryThe supplier demonstrates documented quality, complaint-handling, corrective-action, R&D, and supplier-assessment procedures. It has technical engineering support, available R&D audit documentation, 3D design services, broad customization options, recent new-product activity, three production lines, stated lithium battery cell and battery output, inventory capability, and participation in the Canton Fair. However, it lacks a valid manufacturing-capacity contract with associated subcontractors, overseas warehouses, overseas showrooms, and overseas agents or branches. Overseas service coverage is recorded as zero countries. Financial information is insufficient for assessment, and no customer cases or certifications are provided.

Supplier typeThe supplier is identified as a combined company offering general information, export trade, manufacturing, service, quality control, and R&D capabilities. It is not identified as an offshore company.

After-Sales capabilityThe supplier has documented and followed procedures for corrective and preventive actions and customer complaints, and its engineers provide technical support for production and after-sales service. However, it has no overseas warehouse, showroom, agent, or branch, and overseas service coverage is recorded as zero countries.

R&D capabilityR&D engineers handle customer-request confirmation, technical support, and new product development. The supplier reports available design input, output, review, verification, and validation documents, provides 3D software design services, and had new products during the past year.

Production capacityThe supplier operates three production lines and lists lithium battery cell and battery output, with inventory capability and stated off-season lead time within 15 workdays. However, it has no valid contract covering manufacturing capacity with associated subcontractors, which is a documented capacity-management deficiency.

Customization capabilityThe supplier explicitly provides 3D software design services and supports customization from samples, designs, full customization, minor customization, and flexible customization. These capabilities are reported in both the R&D and facility-related information.