Can you explain in detail how you match cells for a battery pack before you assembling the pack?

We will do the following things before assembling the pack: a. Select capacity, same capacities cells for one pack b. Measure the voltage, same voltage cells for one pack(difference is under 0.02v per cell) c. Measure the inner resistance,same IR cells for one pack (difference is under 1m Ohm) All above steps are very strict to make sure the pack performance is perfect.

Rechargeable Battery 3.7V 6ah 855686 Lithium Ion Polymer Battery for Digital Device

Name: Rechargeable Battery 3.7V 6ah 855686 Lithium Ion Polymer Battery for Digital Device
Brand: Shenzhen A&S Power Technology Co., Ltd.
SKU: 2177147105

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

US$3.85-4.25

1,000 Pieces

Sample price:US$4.25/piece.Request sample

Product profile

Customization

Available

Type

Li-ion Battery

Cathode Material

LCO

Model NO.

AS855686

Rechargeable

Yes

Size

Large

Weight

130g

Cycle Life

500times

OEM/ODM

Yes

Manufacture

Yes

Warranty

12 Months

Typical Capacity

6000mAh

Minimum Capacity

5500mAh

Sample Order Delivery Time

1-2 Weeks

Formal Order Delivery Time

3-4 Weeks

PCB

Available

Connector

Jst, Molex, etc

Transport Package

Customized, Safety Packaging

Specification

8.7*58.5*88.5mm

Trademark

A&S POWER

Origin

China

HS Code

8507802000

Production Capacity

5000PCS/Day

Key features

High Capacity 6000mAh: Typical capacity of 6000mAh with minimum 5500mAh guaranteed.

OEM/ODM Customization: Full customization available including weight, cycle life, and logo printing.

12 Months Warranty: Comprehensive 12-month warranty coverage for all mechanical defects.

Strict Cell Matching: Cells matched by capacity, voltage (diff <0.02V), and resistance (diff <1m Ohm).

Fast Sample Delivery: Samples delivered within 1-2 weeks for quality testing and market research.

Flexible Payment Terms: Accepts T/T, L/C, Western Union, and Cash with flexible advance options.

Factory Direct Supply: Direct manufacturer with 14 years export experience and 2 R&D engineers.

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: ≤2.52h

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:Can I have some samples for testing quality?

Yes, you can buy some samples of any our products for testing quality and market.

Q:How should I pay?

You can pay via T/T, L/C at sight, Western Union, Cash etc., 100% T/T in advance for samples. For large quantities, 30% T/T in advance as soon as order confirmed and the balance before shipping via T/T or L/C etc. If you prefer other payment terms, please contact us freely.

Q:What is your package looks like? Can I have the customized package?

We have factory's current standard package, customized print logo shall be complied to buyer's requirements, and the extra charges will be borne by the buyers, for more details, please contact us.

Q:What is delivery time if we place an order?

It depends order quantities. Usually, we can deliver goods within 3 -5 working days for small orders, for more QTY. order, let's confirm when you place official order.

Q:Are you factory?

yes,we are factory.