3s4a 11.1V Round PCM Power Bank PCB Active Balancer Smart BMS

Name: 3s4a 11.1V Round PCM Power Bank PCB Active Balancer Smart BMS
Brand: Shenzhen Li-ion Battery Bodyguard Technology Co., Limited
SKU: 880657135

Guangdong, ChinaShenzhen Li-ion Battery Bodyguard Technology Co., Limited

US$6.58

6-99 Pieces

US$5.58

100-999 Pieces

US$4.58

1,000-9,999 Pieces

US$4.00

10,000+ Pieces

Sample price:US$6.58/piece.Request sample

Product profile

Customization

Available

Product Name

PCM

Usage

Lithium Battery Packs, LiFePO4 etc

Model NO.

LWS-3S4A-421(3S)

Series

Working Current

Metal Coating

Copper

Mode of Production

SMT

Layers

Double-Layer

Base Material

Fr-4

Certification

RoHS, ISO

Customized

Condition

Used

Testing Service

100%E-Testing

Transport Package

Electrostatic Bag and Carton

Specification

L17.5*W17.5*T4mm

Trademark

LWS

Origin

China

HS Code

8536300000

Key features

Comprehensive Protection Functions: Protects against over-charge, over-discharge, over-current, short-circuit, and temperature issues.

Smart Active Balancing: Ensures cell voltage balance for extended battery life and stable performance.

Premium Components: Features original imported ICs from Japan, MOS from USA, and components from Samsung.

Full Customization Support: Offers OEM/ODM services with flexible customization from samples or designs.

Rigorous Quality Testing: Undergoes 100% E-testing, 1.2m drop testing, and short/overcharge tests.

Wide Application Range: Suitable for solar, LED lights, e-bikes, electric scooters, and home energy storage.

Certified Quality: Holds ISO9001, ISO14001, CE, and RoHS certifications.

One Year Warranty: Provides a one-year warranty covering mechanical defects and performance issues.

Company profile

Self-brandedPatents AwardedYears of Export ExperienceHigh Repeat Buyers Choice

Shenzhen Li-ion Battery Bodyguard Technology Co., Limited

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: 12 years CertifiedNearest Port: Shenzhen Port, Hong Kong PortAverage Response Time: ≤6.22h

AI-Powered supplier vetting

SummaryThe supplier presents itself as a Battery BMS manufacturer with documented quality, service, R&D, and production processes. It reports OEM and ODM services, SDK availability, 3D design, broad customization, recent new-product activity, and documented design and verification records. Production-related evidence includes SMT, screen printing, reflow soldering, AOI, coating, drying, packaging, and dedicated testing equipment, with standardized finished-product inspection instructions. It has participated in several offline trade shows and identifies Shenzhen and Hong Kong ports as nearby logistics points. However, the provided information does not establish certifications, named customer cases, or financial performance; it also reports no overseas warehouses, showrooms, agents, or branches.

Supplier typeThe supplier identifies itself as an active Battery BMS manufacturer and reports both OEM services for well-known brands and ODM services. This supports classification as a BMS manufacturer with contract design and manufacturing capabilities.

After-Sales capabilityThe supplier reports clear procedures and followed records for corrective and preventive actions and customer complaint handling. Its technology engineers also provide technical support for production and after-sales service, indicating documented and technically supported after-sales processes.

R&D capabilityR&D engineers handle customer-request confirmation, technical support, and new-product development; design input, output, review, verification, and validation documents are reportedly available for audit. The supplier also reports new products within the past year, ODM capability, and SDK availability, providing explicit evidence of active R&D capability.

Production capacityThe supplier reports multiple manufacturing and testing facilities, including SMT, screen printing, reflow soldering, AOI, coating, drying, packaging, and dedicated power-protection-board testing equipment. It also states that finished-product inspection instructions are available and uniformly followed, while quality assurance and written supplier-service assessment procedures are reported.

Customization capabilityThe supplier provides 3D software design services and reports customization from samples, designs, flexible customization, minor customization, and full customization. These statements directly support broad product and design customization capability.

Product Q&A

Q:How do I judge what material my battery is?

Please take a look at the battery body. If the normal voltage of your battery shows as 3.2V, the battery will be LiFePo4. If the normal voltage of your battery shows as 3.6V or 3.7V, the battery will be Li-ion or Li-polymer battery. You can also ask battery manufacturer the material of battery.

Q:Can I use this protection circuit board for my battery?

Can use this protection circuit board, or not? There are 2 questions: How much cells in series is your battery pack? The protection circuit board you need to buy must be same cells in series as your battery pack.

Q:What material is your battery?

Only the LiFePo4 battery has different electric parameter from other battery, so if you need buy the protection circuit board for LiFePo4 battery, Please let us know firstly.

Q:Do we need cell balance or not?

The function of balance: Since battery is made of many pcs of cells in parallel and in series, the cells can't be the same as no two people in the world is the same, so can only put in group with similar performance is not without balance function

Q:Do you have Minimum Order Requirement (MOQ)?

No, We don't have MOQ, Different customer have different requirement, We can provide various capacity and size as per your requirements, Also ODM / OEM is welcome.