Important Notice on Korean Market


Having the right battery pack is crucial for the success of your project. With over 10 years of experience focusing on battery packs and chargers, we deeply understand how battery systems bring out the best in various applications. Our solutions range from off-the-shelf batteries to custom ones, and from concept design to mass production. With an experienced engineering team, state-of-the-art R&D laboratory, and advanced production equipment, our one-stop battery solution includes all mechanical design, 3D drawing, BMS design, mold tooling, injection molding, SMT, assembly, and testing. When it comes to finding reliable battery solutions, look no further. Contact us today to discuss your project needs.

Custom Battery Solutions

Safe | Smart | Suitable | Superior

Industrial Design

We have the most creative industrial designers who are proficient in battery design. Our batteries and chargers are engineered for visual appeal, ergonomics, superior performance and optimal cost-effectiveness, providing all-round competitive edge for your products.

Precision Molding

Our advanced molding workshop delivers precision molds with 1,000,000+ production cycles. With this, we enable great designs to be mass-manufactured. Having high-quality molds means you won't need to maintain them constantly and endure the resulting production delays.

Safe & Smart BMS

Battery safety is always our first approach. By building smart Battery Management System (BMS), we make battery, charger and host device work as a system. The BMS monitors battery status, accurately evaluates SoC and communicates with the host device to provide absolute electrical protection during operation and improve the security, interactivity and intelligence of your finished product.

Fast Charging

RHY utilizes air cooling charging technology to prevent battery and charger from overheating. The air generated by the charger's cooling fan circulates through the battery and the charger, cooling the parts and the battery cells during fast charging. Our charger achieves a perfect combination of safe charging and high charging efficiency.

Steps to Customize Your Battery Pack


Submit your request


Thorough analysis of your requirements to determine optimal battery strategy, including voltage, capacity, power, size, connecting methods, etc.


Utilize cutting-edge design tools and techniques to create the design, including initial concept, 3D CAD drawings, BMS integration, charging solution, etc.


Our advanced mold workshop and outstanding technicians are dedicated to turning concepts into tangible, market-ready products.


Implement a thorough testing and validation process, including performance, safety, compatibility and environmental testing.


Benefit from our highly automated and integrated production lines, capable of delivering over 10,000 batteries and 5,000 chargers per day.

Customization Range







We select the right cell chemistry, brand, model and specification based on your budget and the battery voltage, charge & discharge current, cell internal resistance and working conditions required for your applications. 18650 / 21700 rechargeable lithium-ion cells from Samsung, LG, Sony, Moli, Highstar, Sunpower and other top manufacturers are most commonly used by us.

Battery Management Systems

We engineer and build smart Battery Management System (BMS) which allows digital communications between battery and host device, between battery and charger through I2C, SMBus, CAN, etc., exchanging the information of battery voltage, temperature, current, state-of-charge (SoC) and health status. The system monitors and manages each single cell intelligently to balance the voltage and state of charge among the cells, protecting the battery from overcharge, overdischarge and overheating, optimizing battery performance, and prolonging battery life.

Enclosure & Structure

As for battery enclosure, plastic molded housing or shrink wrap enclosure is usually adopted by us for different standards of structural strength, size & shape, impact resistance, heat dissipation, explosion proof and IP ratings. Exquisite design and appropriate configuration make the battery pack outstanding in look and use. There is a robust holder inside the battery to fix cells, PCB/PCBA, connectors and other components. We adopt the most suitable enclosure design and internal structure for you.


The insatiable pursuit of fast charging can actually damage the battery. RHY's unique air cooling charging technology prevents battery and charger from overheating by cooling the battery and charger when charging, so as to ensure safe charging, improve charging efficiency and optimize battery life.


RHY supplies connector assembly including a terminal base, metal contacts and wiring harnesses which are connected from your device to our batteries, which transmits power and carries digital communications. You just need to simply implant them into your device, and the device will perfectly work with the battery.

You can also choose directly from our off-the-shelf (OTS) battery packs and chargers which are market tested and can be customized on demand as well.

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Case Study

Strapping Tool Battery

A world's leading strapping tool manufacturer, originally purchased from Bosch, but eventually came to RHY because of our custom service and almost half the cost. As expected, the battery and charger we customized for the strapping tool outperform their originals.

*We protect the privacy of our customers. The image is for reference only.

Disinfectant Sprayer Battery

The product is a new release of electrostatic disinfectant sprayer. The battery circuit board is covered with waterproof coating to allow for use in moist conditions. Our engineering team customized a BMS that features electrical protection to ensure the battery safety.

*We protect the privacy of our customers. The image is for reference only.

Vacuum Cleaner Battery

RHY is proud to be the supplier of Viomi (NASDAQ: VIOT, Xiaomi Ecological Chain Enterprise), supplying 25.9V Li-ion batteries for Viomi Cyber Smart Wet-Dry Vacuum Cleaner. Our batteries are powerful and feature very low failure rate and longer lifespan.

*We protect the privacy of our customers. The image is for reference only.

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