How can I place an order?

We accept Trade Assurance orders online. For RTS products, you can pay directly if shipping costs are clear, or provide shipping info for us to create an online order.

Are these batteries suitable for DIY projects?

These are prototype batteries without protection boards. You must purchase a matching protection board separately before use.

Replacement E58 3.7V Polymer Li-ion Battery, Brand New Pouch Cell for Bluetooth Speaker & Smart Devices Compatible: 29f 32b P37 E58 E61 E66 E78

Name: Replacement E58 3.7V Polymer Li-ion Battery, Brand New Pouch Cell for Bluetooth Speaker & Smart Devices Compatible: 29f 32b P37 E58 E61 E66 E78
Brand: Shenzhen Hengwangda New Energy Technology Co., Ltd.
SKU: 2143803352

Guangdong, ChinaShenzhen Hengwangda New Energy Technology Co., Ltd.

US$17.00

10-99 pieces

US$15.00

100-999 pieces

US$13.00

1,000-9,999 pieces

US$8.50

10,000+ pieces

Product specifications

Polymer Battery

Sample price:US$100.00/piece.Request sample

Product profile

Customization

Available

Type

LiFePO4 Battery

Cathode Material

LFP

Model NO.

LG E58

Rechargeable

Yes

Size

11.5*98*322mm

Model Number

3.7V 58ah

Capacity

58ah

Weight

820g

Voltage

3.7(V)

Cycle Life

6000 Times

Cathode Materials

Ncm

Battery Size

Polymer Battery

Electric Energy

214.6

Operating Temperature(℃)

0-22℃

Battery Type

Solid State

Apllication

Consumer Electronics, Power Tools, Boats

Transport Package

42*25*30cm

Specification

11.5*98*322mm

Trademark

Other

Origin

Guangdong, China

HS Code

8507600090

Production Capacity

500000 Pieces/Moon

Key features

High Cycle Life: Up to 6000 cycles for long-term durability and reliability.

Customization Options: Offers full customization, minor customization, and customization from samples or designs.

Pre-Shipment Testing: 100% visual and function inspection with voltage, resistance, and capacity checks before shipment.

Fast Shipping: RTS products prioritized with peak and off-peak season lead times within 15 workdays.

Comprehensive Warranty: 15-day testing window for single cell verification with return policy for unused items.

Free Accessories: Each battery includes one busbar and two bolts or studs at no extra cost.

Certified Quality: Products certified with FCC and CE standards for safety and compliance.

Secure Packaging: 5-layer dangerous goods export carton with custom sponge and insulation tape.

Company profile

In-stock CapacityFast DeliveryProduct CertificationQuality Assurance

Shenzhen Hengwangda New Energy Technology Co., Ltd.

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 4 Years CertifiedNearest Port: Shenzhen PortAverage Response Time: ≤11.72h

AI-Powered supplier vetting

SummaryThe supplier is a combined company focused on lithium battery sales, customized solutions, and technical support. It reports strong R&D capabilities, new products within the past year, ODM services, and broad customization options. Production evidence is limited to one production line, with no ongoing quantity reconciliation and no standardized outsourcing procedure. Service processes and corrective-action procedures exist but lack written records, while overseas support is limited: no agents, branches, warehouses, showrooms, or offline trade-show participation are reported. Quality assurance is stated, but certification, financial credibility, and customer-case evidence are not provided.

Supplier typeThe supplier is identified as a combined company rather than an offshore company. Its described business centers on lithium battery sales, customized solutions, and technical support, indicating a supplier combining commercial and operational functions.

R&D capabilityThe supplier reports an R&D team, new products within the past year, and ODM service availability. Its focus on customized lithium battery solutions and technical support further supports active product-development capability.

Production capacityThe supplier reports one production line and in-stock capability, but it has no valid manufacturing-capacity contract with associated subcontractors, no ongoing batch quantity reconciliation, and no standard outsourcing procedure. These documented controls indicate production-management weaknesses despite the stated production capacity.

Customization capabilityThe supplier explicitly supports customization from samples, minor and full customization, customization from designs, flexible customization, and ODM services. Its core business also includes customized lithium battery solutions, providing direct evidence of broad customization capability.

Product Q&A

Q:Do I need to balance the battery cells before assembly?

Yes, DIY battery packs must have cells balanced (same voltage) before assembly. Refunds are not accepted for wrong assembly or failure to assemble.

Q:What is the return policy for these batteries?

Returns are only accepted if the battery is unused (electrode intact, no welding, no wear). Buyers must pay shipping fees for returns. Returns are not accepted after assembly or if damage is caused by improper charging or lack of BMS.

Q:How long do I have to test the cells after arrival?

You can test the cells within 15 days of arrival. After this period, the batteries are considered problem-free, and no returns or refunds will be provided.

Q:Do the batteries come with busbars and bolts?

Yes, each battery comes with one busbar and two bolts or studs for free. Contact us if you need more or special specifications.

Q:What situations are not eligible for return or refund?

Returns are not accepted for assembly errors, protection board issues, charger failure, battery bulge, welding damage, or damage caused by charging without a BMS.