High-Capacity 3.7V 400mAh Li-Polymer Battery for Smart Watches

Name: High-Capacity 3.7V 400mAh Li-Polymer Battery for Smart Watches
Brand: Dongguan APTPES Co., Ltd.
SKU: 2165658792

Guangdong, ChinaDongguan APTPES Co., Ltd.

US$0.70-0.90

5,000 Pieces

Product specifications

503030-3.7V 400mAh

Sample price:US$2.00/piece.Request sample

Product profile

Customization

Available

Type

Li-ion Battery

Cathode Material

NCM

Model NO.

503030-3.7V 400mAh

Rechargeable

Yes

Size

Small

Battery Type

Li-Polymer Battery

Nominal Voltage

3.7V

Nominal Capacity

500mAh (400mAh - 999mAh Available)

Shape

Pouched / Flexible Softpack

Specifications

Thickness Max 5.2mm * Width Max 30.5mm * Length Ma

Certification

Kc, CE, RoHS, Reach, Un38.3, MSDS

MOQ

2000PCS

Cycle Life

300 Times, Depending on Charge&Discharge Frequenc

OEM

Available

Sample Time

Depending on Order Arrangement

Factory Audit

Acceptable

Connector

Custom

Cable

Custom

Payment

Transport Package

Custom

Specification

Thickness Max 5.2mm * Width Max 30.5mm * Length Ma

Trademark

APTPES or OEM

Origin

China

HS Code

8507600090

Production Capacity

2000000PCS/Month

Company profile

Product CertificationStandardized quality controlOEM ServicesR&D Capabilities

Dongguan APTPES 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.Average Response Time: ≤3.05h CertifiedTerms of Payment: T/T, LC, PayPal, etc. CertifiedInternational Commercial Terms(Incoterms): FOB, EXW, CIF, CFR

AI-Powered supplier vetting

SummaryThe supplier demonstrates broad product development and customization capabilities, including 3D design, ODM, OEM for popular brands, and multiple customization modes. Its R&D organization includes specialized engineers, documented design controls, and evidence of new product development. Quality and service processes are documented and followed for complaints, corrective actions, supplier assessment, and finished-product inspection. Manufacturing support includes valid contracts with associated subcontractors and inventory capability, while export experience is stated as eight years with 51%–70% of sales from exports. Overseas service infrastructure is limited: the supplier has no overseas warehouse, showroom, agents, or branches, and reports zero countries served through such capabilities. Financial credibility cannot be assessed from the provided information.

Supplier typeThe supplier provides comprehensive energy solutions spanning project initiation, development, testing, production, and after-sales service. It also offers ODM services, OEM services for popular brands, inventory capability, and contracted manufacturing support, indicating a manufacturer with integrated development and production-related services.

After-Sales capabilityThe supplier has a documented and followed customer-complaint procedure, and its technology engineers provide technical support for production and after-sales service. The company description also explicitly includes after-sales service within its comprehensive solution coverage, supporting an established after-sales process.

R&D capabilityThe supplier reports new products during the past year, maintains an R&D team with masters and senior engineers across electronics, power supply, structure, technology, and electrochemistry, and retains auditable design input, output, review, verification, and validation documents. It also emphasizes technological innovation and applies technology from chip and cell-manufacturing partners to product R&D; however, no SDK is available.

Production capacityProduction-related controls include quality assurance, documented finished-product inspection instructions that are uniformly followed, valid manufacturing contracts with associated subcontractors, inventory capability, and stated average lead times of within 15 working days off-season and one month during peak season. These records support production and quality-control capability, although the stated quantity capability for own-brand products is only “1” and is not sufficiently defined for a capacity comparison.

Customization capabilityThe supplier offers customization from samples and designs, full, minor, and flexible customization, as well as 3D software design, ODM, and R&D-supported technical services. Engineers confirm customer requirements and support new product development, providing explicit evidence of broad customization capability.

Client casesThe supplier states that it maintains long-term, stable cooperation with world-renowned chip companies and cell manufacturing enterprises and provides OEM services for popular brands. It also reports participation in the GIFT & HOME Exhibition, but no specific customer names, project details, or independently verifiable case outcomes are provided.