What is the cycle life of this battery?

The battery offers a long cycle life, capable of being charged up to 500 times.

Do you offer a warranty for the battery?

Yes, we provide a one-year warranty. If there are any quality problems not caused by improper use or man-made damage, we will replace them one by one.

Small Capacity Rechargeable Li-Polymer Battery 351120 3.7V 40mAh for Earphone

Name: Small Capacity Rechargeable Li-Polymer Battery 351120 3.7V 40mAh for Earphone
Brand: Shenzhen A&S Power Technology Co., Ltd.
SKU: 2197989545

Guangdong, ChinaShenzhen A&S Power Technology Co., Ltd.

US$0.95-1.05

500 Pieces

Sample price:US$1.05/piece.Request sample

Product profile

Customization

Available

Type

Lithium-Polymer Battery

Cathode Material

LCO

Model NO.

AS351120

Rechargeable

Chargeable

Size

Small

Product Name

Rechargeable 3.7V 40mAh Lithium Polymer Battery

Capacity

40mAh

Voltage

3.7V

Note

Other Sizes Are Availbale

Dimension

Can Be Customized

Cycle Life

>500 Times

Warranty

12 Months

Samples

Samples for Testing Are Available

Manufacturer

Factory with Over 600 Workers, 100000PCS Per Day

Connector

Jst, Molex, etc

PCB

Available

Discharge Rate

Low Discharge Rate

Shape

Square Battery

Nominal Voltage

3.7V

Electrolyte

Lithium Polymer Battery

Transport Package

Standard Safe Cartons

Specification

3.5x11x20mm

Trademark

AS Power / OEM / ODM

Origin

Made in China

HS Code

8507600090

Production Capacity

100000PCS Per Day

Key features

Customizable Dimensions: Battery dimensions can be customized to meet specific application requirements.

Long Cycle Life: Rechargeable up to 500 times with stable performance over extended usage.

Comprehensive Certifications: UL1642, UN38.3, IEC62133, KC, BIS, CB, CE, and ROHS certified for global safety.

Fast Charging Capability: Supports 1.0C fast charge current (40mA) with standard charge voltage of 4.2V.

Free Sample Availability: 5 free samples provided for testing; buyer covers shipping costs for stock models.

One-Year Warranty: Full replacement warranty for quality issues not caused by improper use or damage.

High Energy Density: Compact Li-Polymer design offers high energy density with low self-discharge rate.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceYears of Export ExperienceProduct Certification

Shenzhen A&S Power Technology Co., Ltd.

Guangdong, China

Business Type: Manufacturer/Factory, Trading Company, Other CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 14 years CertifiedNearest Port: Shenzhen Port, Hongkong PortAverage Response Time: ≤3.65h

AI-Powered supplier vetting

SummaryThe supplier is identified as a manufacturing-sector trading company in Longhua District, with OEM support for well-known brands, SDK availability, and documented R&D processes. It reports substantial LiFePO4 and lipo battery output, exports to East Asia, Europe, Australia, North America, and domestic markets, and typically fulfills orders within 15 working days during peak season. Customization is offered across several levels, while after-sales handling has documented complaint procedures and corrective-action records. The supplier reports CE, UL, IEC62133, and RoHS certifications, but the provided information does not independently verify them. Innovation evidence is mixed: the supplier has two R&D engineers, two patents, and R&D documentation, but no new products were launched last year. Overseas service infrastructure is limited, with no overseas warehouses, showrooms, agents, or branches. No specific customer names or case studies are provided.

CertificationsThe company description states that its products obtained CE, UL, IEC62133, and RoHS certification. These certifications are explicitly claimed, although no certificate numbers, issuing bodies, or validity details are provided in the slices.

After-Sales capabilityThe supplier has documented procedures and records for complaint handling, service-capability assessment, and corrective/preventive actions, and it offers training as an overseas service. However, it has no overseas warehouses, showrooms, agents, or branches, and the overseas-service country count is stated as zero.

R&D capabilityThe supplier reports SDK availability, two R&D engineers, two patents, R&D design and customization responsibilities, and auditable design input/output, review, verification, and validation documents. Against this, it launched no new products in the past year, so the evidence supports established R&D capability but not recent product-launch activity.

Production capacityReported output is 16.5 million LiFePO4 battery pieces and 26.4 million lipo battery pieces, with peak-season fulfillment within 15 working days and off-season lead time stated as within 15 working days to one month. The supplier also serves multiple international markets, but its quality-control testing equipment count is stated as zero and the quality-assurance and traceability statuses are unknown.

Customization capabilityThe supplier provides OEM services for well-known brands and supports customization from samples, designs, full customization, minor customization, and flexible customization. Its R&D engineers are specifically responsible for designing and customizing products according to customer needs, with supporting R&D documentation available for audit.

Product Q&A

Q:Where can I get the price?

We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price, please call us or tell us in your email so that we'll regard your inquiry priority.

Q:How can I get a sample to check your quality?

After price confirmation, you can require for samples to check our quality.

Q:What about the lead time for mass production?

Honestly, it depends on your order quantity and the season you place your order. We suggested that you start inquiry a few months before the date you would like to get the products at your country.

Q:What is your terms of payment?

We accept T/T and L/C.

Q:Is the battery dimension customizable?

Yes, the dimension of the battery can be customized according to your specific needs.