Custom Polymer Lithium Battery Manufacturer | LiFePO4 Battery Factory

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Why Global Buyers Choose KRL Battery

Reliable OEM & ODM Lithium Battery Solutions for Long-Term Business Cooperation

Grade A Battery Cells

Only Grade A Cells for Stable Performance and Longer Cycle Life.

OEM / ODM Customization

Custom Size, Voltage, Capacity, Connector and PCM/BMS Support.

Strict Quality Control

100% Aging Test and Multi-Step Quality Inspection Before Shipment.

Fast Sampling & Delivery

24H Response and Fast Sample Delivery for OEM Projects.

About Us

Shenzhen Keruilong Technology Co., Ltd., founded in 2005, is a professional manufacturer integrating the R&D, production, and sales of polymer lithiumion cells and battery packs. The company has been recognized as a "Specialized and Innovative Enterprise" by the Shenzhen government.
Renowned for their practicality, safety, and reliability, Keruilong's products are widely sold across the globe and have been successfully applied in diverse fields such as medical beauty equipment, smart home systems, wearable devices, consumer electronics,electric tool loT.
The product range includes polymer lithium-ion batteries designed for high and low-temperature environments, high-rate discharge cells, cylindrical batteries, portable outdoor energy storage and LiFePo4 battery. All products are certified under ISO9001, ISO14001, and ISO45001. Additionally, they meet international standards such as UL, 3C, KC, PSE, CB, CE, RoHS and more.
We sincerely welcome your cooperation to create mutual development and a win-win future.

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OUR FACTORY

KRL – Real Factory, Real Strength

1 We have a standardized intelligent factory with:

·Automated production lines
·Professional R&D center
·Complete testing laboratory
·Strict dust-free workshop
·Large-scale production capacity

2 Our factory ensures:

✅ Stable quality
✅ Fast delivery
✅ Competitive factory price
✅ Strong customization capability
✅ Long-term stable supply

QC DETECTION PROCESS

6-Step Strict Quality Control System

Incoming Material InspectionAll raw

materials 100% tested before production.

Production Process ControlReal-time

monitoring in every production step.

Fully automated equipment

The factory adopts fully automatic and semi-automatic equipment.

Semi-Finished Product TestVoltage

internal resistance, capacity full test.

Aging & Reliability TestHigh/low

Pre-Shipment Final Inspection

Only 100% qualified products can be shipped.

KRL Battery
Shenzhen Keruilong Technology Co., Ltd.

CUSTOM SOLUTIONS

We support full customization to meet your special needs

What Can We Customize?

·Voltage (3.7V, 7.4V, 11.1V, 14.8V, 24V, etc.)
·Capacity (50mAh–10,000mAh)
·Size (ultra-thin, regular, irregular shape)
·BMS protection board
·Connector and wire
·Logo and packaging

Custom Process
1.Send your requirements
2.We provide solution & quotation
3.Sample production (5-7 days)
4.Sample confirmation
5.Mass production & delivery