Custom Battery Pack Manufacturer for Demanding Features
CM Batteries designs and manufactures custom lithium battery packs for devices that require specific voltage, capacity, dimensions, BMS functions, connectors, certification support, and challenging operating environments.
Our strongest capability is custom battery pack integration for demanding conditions, especially applications that require stable battery performance in environments above 85°C. Instead of offering only a standard high-temperature cell, CMB develops complete battery pack solutions based on the device structure, operating temperature, protection requirements, and system-level integration needs.
For projects that combine high temperature with waterproofing, smart IoT communication, explosion-proof design, compact structure, or medical-grade reliability, our engineering team can help turn complex power requirements into a practical and manufacturable battery solution.
What Problems Can CMB Solve?CMB helps engineering and procurement teams solve battery challenges such as:
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CMB has successfully completed more than 800 custom battery pack projects, with strong experience in
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Custom Li-ion Battery Pack Solutions for Your Device
No matter what your project needs in terms of working conditions, cell chemistry, or form factor, our engineering team designs battery pack systems that work well, are safe, and can be used for a long time.
Custom Batteries by Application Features
Custom Made Batteries by Cell Chemistry
Customized Battery by Cell Size & Format
Custom Lithium ion Batteries for Diverse Applications
Why Choose CMB As Your Custom Battery Pack Manufacturer？
Driven by a Top-Tier CTO & 5 Specialized Engineers: 800+ Projects Delivered Since 2014
Our engineering team is led by a CTO with 16+ years at CATL, BYD, and BAK. This top-tier expertise drives every project. With 5 specialized engineers, we integrate design, testing, and QC to solve your toughest power challenges.
We don’t just assemble — we engineer with precision. Using CAD, SolidWorks, and electrical design tools, we create custom battery solutions for IP67/IP68 water resistant, explosion-proof housings, and heat management. To save you time, we use AI-assisted analysis and simulation to speed up validation and reduce errors. This tech-first approach, backed by 800+ successful projects, ensures every battery is built for safety and performance.
Smart BMS with Multi-Protocol Communication
CMB develops customized BMS solutions tailored to each application, enabling precise, real-time monitoring of cell voltage, temperature, and SOC at the cell level.
Our Smart BMS supports multiple communication protocols, including TCP, UART, CAN (250k–1Mbps), RS485, RS232, and Bluetooth, ensuring seamless integration with host systems, controllers, and cloud platforms.
Built with reputable MOSFETs and ICs from RICOH, Seiko, TI, and BQ, each BMS is engineered for stable protection, accurate data transmission, and long-term reliability—keeping your custom lithium batteries operating within the safest and most efficient parameters at all times.
Tier-1 Cell Selection for Custom Battery Design
We ensure quality by controlling every part of the battery pack. We have direct and stable supply chains with top-tier cell brands like CATL, BYD, Samsung, Panasonic, and EVE. We guarantee 100% original, Grade-A cells with full tracking records.
Beyond cells, we strictly check every accessory. We use UL-certified wires, high-quality connectors, and precision-made housings to ensure the whole pack is safe and durable. By choosing the right battery type (Li-ion, LiFePO4, or Li-Polymer) and matching it with high-end hardware, we ensure your product works perfectly with a long service life.
Battery Pack Certification for Global Markets
Navigating international regulations is seamless with CMB. Our factory is ISO 9001:2015 certified, and we provide comprehensive support for obtaining UL, CE, UN38.3, IEC62133, and RoHS certifications. Our quality control isn’t a final step—it’s a continuous process, culminating in 100% EOL (End-of-Line) testing including vibration, drop, and thermal shock tests to ensure zero-defect delivery.
100% Traceable IQC, IPQC, and OQC Workflows.
As a battery pack manufacturer, CM Batteries focuses on manufacturing discipline and process transparency to ensure consistent performance at scale.
Every production stage is managed through clearly defined and openly shared quality control processes, including IQC, IPQC, and OQC, along with controlled temperature- and humidity-managed storage and protective packaging standards.
To ensure full alignment before mass delivery, custom battery samples are provided with each batch order, allowing customers to clearly evaluate build quality, performance consistency, and compliance expectations in advance.
Lithium-ion battery pack manufacturing process includes separate cell sorting, assembly, and insulation stages to ensure high performance, safety, and longevity for all of our custom rechargeable battery packs.
From Concept to Sample in 14 Days: Your 24/7 Engineering Partner.
Whether you are in the early design phase or ready for production, we are here to help. Once your requirements are confirmed, we can deliver functional prototypes in just 2 weeks to keep your testing and validation on track. To eliminate time-zone delays, our technical team is available 24/7 for consultations, providing the expert answers your engineers need, exactly when they need them.
From your first 3D design draft to full-scale mass production, a dedicated project manager will guide you through every step with transparent, real-time updates.
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FAQs about Custom Battery Packs
CMB specializes in application-specific battery pack projects, especially those involving high-temperature environments above 85°C, waterproof design, smart BMS communication, explosion-proof requirements, compact structures, and demanding operating conditions.
Please provide voltage, capacity, size limit, current requirement, application, operating temperature, environmental conditions, BMS functions, communication protocol, connector type, certification needs, and estimated production quantity. Drawings, samples, and product specifications are also helpful.
Yes. Many projects require multiple design requirements at the same time, such as high temperature plus waterproofing, high temperature plus IoT communication, or high temperature plus explosion-proof protection. CMB can evaluate the full application environment and design the battery pack as an integrated system.
In our products, we use cells from Panasonic, Samsung, LG, and other well known Chinese brands. The most important process is determining the right cells for each customer’s unique battery pack needs, and our Research & Development team is well equipped to make those determinations.
Yes. CMB can support smart BMS functions such as battery status monitoring, communication, data logging, fuel gauge, temperature monitoring, and protection logic. Communication options can include CAN, UART, SMBus, RS485, Bluetooth, or custom protocols.
CMB can support common battery certification and compliance requirements, including UN38.3, IEC62133, UL-related evaluation, CE, RoHS, MSDS, and shipping documents. Certification requirements should be confirmed early because they may affect cell selection, design, testing, and production planning.
CMB is 100% responsible for the international insurance of its battery packs. The end-user can make a claim with CMB in the unlikely case that a battery catches fire.
Yes. If you have an existing battery pack, CMB can review the sample, drawing, specifications, connector, dimensions, voltage, capacity, and protection requirements. We can help improve the design for better safety, reliability, environmental performance, or production stability.
