What are the payment terms?

By T/T, 50% for deposit, and balance all before shipment. For small amount, we also accept full payment, payment via PayPal, Western Union.

How to handle quality problems?

Take photos & videos of the problems and send to us. Send back the physical problem battery by express to us. Engineer will analyze the defective battery within 2 working day.

Can you print our logo?

Yes, and we will do this free of charge if the order quantity is big enough, please contact us for more details.

Solar Lithium Battery 503048 2s 7.4V 850mAh Rechargeable Lithium Ion Polymer Battery Pack for Bluetooth Speaker

Name: Solar Lithium Battery 503048 2s 7.4V 850mAh Rechargeable Lithium Ion Polymer Battery Pack for Bluetooth Speaker
Brand: Shenzhen Resky Electronics Co., Ltd.
SKU: 799693092

Guangdong, ChinaShenzhen Resky Electronics Co., Ltd.

US$1.00-2.00

100 Pieces

Sample price:US$2.00/piece.Request sample

Product profile

Customization

Available

Type

Lithium-Polymer Battery

Usage

Car, Bus, UPS, Electric Power, Lighting, Electric Bicycle, Boat, Telecommunications

Model NO.

RSK-503048-2S

Nominal Voltage

7.4V

Discharge Rate

Low Discharge Rate

Shape

Square Battery

Electrolyte

Li(Nicomn)O2

Installation

Packaged

Rechargeable

Chargeable

Nominal Capacity

850mAh

Charging Current

0.2c

Continuous Discharging Current

0.5c

Max Discharging Current

Weight

35g

MOQ

10PCS

Cycle Life

500cycles

Warranty

12months

Shipping

DHL, FedEx, TNT, by Air, by Sea

Certification

CE, RoHS, MSDS, Un38.3

Lead Time

3-7workdays

Original

China

Color

Blue PVC

Material

Ncm

OEM Service

Yes

Transport Package

1PCS/Box

Specification

5*30*48mm

Trademark

OEM

Origin

China

HS Code

8507600090

Production Capacity

100000PCS/Day

Key features

High Energy Density: Provides high output voltage and excellent energy density for efficient power delivery.

Long Cycle Life: Supports more than 500 repeated charge and discharge cycles for extended durability.

Advanced Safety Protection: Features dual IC chips for anti-shortcircuit, overcharge, overcurrent, and overload protection.

Fast Charging Capability: Can be fully charged in 2 to 3 hours with a rated voltage of 4.2V per cell.

Wide Application Range: Suitable for Bluetooth speakers, electric bicycles, medical devices, and power tools.

Professional Customization: Professional engineers provide tailored solutions based on specific customer requirements.

Comprehensive Certifications: Certified with CE, RoHS, MSDS, UN38.3, and IEC61233 standards for safety and quality.

Flexible OEM Service: Logo printing available free of charge for large orders; custom designs supported.

Company profile

High Repeat Buyers ChoiceIn-stock CapacityFast DeliveryR&D Capabilities

Shenzhen Resky Electronics Co., Ltd.

Guangdong, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2012-09-09Nearest Port: SHENZHEN, HONGKONGAverage Response Time: ≤2.37hTerms of Payment: LC, T/T, D/P, etc.International Commercial Terms(Incoterms): FOB, CFR, CIF, DAT, FAS, DDP, DAP, CIP, CPT, FCA, EXW, Others

AI-Powered supplier vetting

SummaryShenzhen Resky Electronics Co., Ltd. is identified as a China-based limited company with both trading and manufacturing/factory characteristics, offering electric vehicle batteries, lithium batteries, RC LiPo batteries, Li-polymer batteries, and chargers. It reports ISO 9001 certification, six to ten quality-control staff, stated annual lithium battery pack output of 2,000,000 sets, and broad export coverage. The supplier supports customization from designs and samples, full and flexible customization, and minor customization. Its R&D function includes one engineer responsible for customer-request confirmation, technical after-sales support, and new product development; relevant R&D audit documents are available, but no SDK is available. It reports OEM service for well-known brands, although no specific customer names or case details are provided. Financial records are indicated for 2021–2023, but the supplied slices do not provide sufficient financial metrics for a substantive credit assessment. An...

Supplier typeThe supplier is described as a limited company based in Shenzhen, China, with both "Trading Company,Manufacturer/Factory" characteristics in one record and "Trading Company" in another. Its stated business scope includes technical development, electronic and solar-energy products, polymer lithium batteries, domestic trade, and import/export activities, indicating a trading-led business with manufacturing/factory capability also reported.

CertificationsThe supplier reports ISO 9001 certification. A BV audit is also recorded, with an audit report period from January 30, 2024 to January 29, 2025; however, the supplied slices do not explain the audit result code or confirm that the certification remains current beyond that period.

After-Sales capabilityThe stated R&D engineer responsibilities include providing technical support for after-sales service, which is direct evidence of technical after-sales support. The supplier also reports in-stock service capacity, but the slices do not establish the breadth, response time, staffing level, or formal service process.

R&D capabilityThe supplier reports one R&D engineer responsible for confirming customer requirements, technical after-sales support, and new product development, and states that design-input, design-output, review, verification, and validation documents are available for audit. It also reports no available SDK, so the evidence supports basic product-development capability but does not establish broader software or platform innovation capability.

Production capacityThe supplier reports lithium battery pack output of 2,000,000 sets and in-stock service capacity, with six to ten quality-control staff and exports to multiple global regions. However, the status of any manufacturing-capacity contract is unknown, so contractual production assurance is not established.

Customization capabilityThe supplier explicitly reports customization from designs, customization from samples, full customization, flexible customization, and minor customization. This indicates a broad stated range of product adaptation services.

Client casesThe supplier states that it provides OEM services for well-known brands, which is evidence of experience serving branded customers. However, no customer names, product examples, order details, or verifiable case descriptions are supplied, so the depth and verifiability of its customer-case record cannot be assessed.

Product Q&A

Q:What is the warranty period?

1 Year Warranty after leaving our factory, our defect rate is under 1%, we'll repaired or replaced the battery for free if non-human factor quality problems be confirmed.

Q:What is the lead time for orders?

3-5 days for sample, 7-10 workdays for large quantity.

Q:Can I have a sample order?

Yes, samples orders are welcome. We can offer free samples if the quantity not above 3 pcs, you only need to pay the shipping cost.

Q:What certificates are available?

We have CE, CB, KC, MSDS, UN38.3 for most our current model, if It's custom-making design, usually no current certificates, we could apply for you if you need, but the related fees should be paid by your side, and if your order is big enough, certificate fees can be refunded.

Q:Can you customize the battery?

Of course. We have professional engineers that can give you the most suitable solution according to your special requirements.