Custom Battery Pack Manufacturer for OEM/ODM Lithium Battery Solutions
Large Power designs and manufactures custom lithium battery packs for medical devices, industrial equipment, security systems, robotics, and infrastructure applications. Our engineering team supports cell selection, voltage and capacity matching, BMS/PCM design, enclosure integration, charging compatibility, safety testing, and OEM/ODM production for reliable device-level power.
Why Choose Large Power as Your Custom Battery Pack Manufacturer?
Standard batteries often force compromises in runtime, safety, size, or device integration. Large Power engineers custom lithium battery packs around your required voltage, capacity, discharge current, dimensions, operating temperature, charging method, and certification needs.
Our engineering team supports projects from cell selection and mechanical design through BMS integration, prototyping, in-house testing, certification support, and volume production. This reduces technical risk and helps OEM customers move from concept to a production-ready battery solution.
For medical, industrial, robotics, security, infrastructure, and specialized electronic equipment, we combine application engineering, controlled manufacturing, and supply-chain management to deliver reliable device-level power.
- Strong Custom Battery Manufacturing Capacity
Our state-of-the-art, ISO 9001-certified facilities are equipped for both rapid prototyping and high-volume production runs. We implement rigorous quality control at every stage, from cell sourcing to final assembly, ensuring every custom battery we produce meets the highest standards of quality and consistency. - High Technologies with Proven Records
We thrive on solving the toughest power challenges. Our engineering team has a proven track record of developing innovative custom power solutions for the most demanding environments. Our expertise includes:- Custom Low-Temperature Batteries:Delivering reliable power in freezing conditions.
- Custom High-Temperature Batteries:Ensuring safety and performance in extreme heat.
- Custom Explosion-Proof Batteries:Providing IECEx-certified power for hazardous locations.
- Custom Semi-Solid State Batteries:Pushing the boundaries of energy density and safety.
- A Collaborative Engineering Partnership
We work as an extension of your team. Our engineers collaborate with you from the initial design phase to understand your device’s unique power profile, mechanical constraints, and performance goals. This partnership ensures the final customized battery is perfectly optimized for your application. - Resilient and Reliable Supply Chain
We mitigate supply chain risks by building strong, long-standing relationships with the world’s leading Tier-1 cell manufacturers, including Panasonic, Samsung, LG, and Saft. Our robust supply chain management ensures access to authentic, high-quality components, providing the stability and predictability your production schedule demands.
Custom Battery Pack by Chemistry: Designed for Your Specific Needs
The core of every great battery pack is its chemistry. We are a technology-agnostic custom battery manufacturer, allowing us to select and engineer the ideal chemistry to meet the specific performance, safety, and cost requirements of your device.
Custom Lithium-Ion Battery Packs
Our lithium-ion (NMC/NCA) batteries offer high energy density, lightweight design, and smart BMS integration for safety and accurate fuel gauging—ideal for medical devices, drones, laptops, and other performance-driven portable electronics.
Custom Lithium Polymer (LiPo) Battery Packs
Our LiPo batteries are engineered for maximum design flexibility, featuring ultra-thin, lightweight, and custom-shaped cells that fit tight spaces and unique device profiles—perfect for wearables, AR/VR headsets, IoT sensors, and slim electronics.
Custom LiFePO4 Battery Packs
Our LiFePO4 batteries offer outstanding safety, thermal stability, and long cycle life—over 2,000+ cycles—making them ideal for medical carts, robotics, backup power, and electric vehicles where long-term reliability and lower TCO matter most.
Custom Battery Pack by Shape
The physical form of your battery is as critical as its chemistry. We engineer packs in both standard and fully custom shapes to ensure perfect mechanical integration and optimal space utilization.
Custom 18650 Battery Pack
The 18650 cylindrical cell offers high reliability, strong thermal performance, and durability. By configuring cells in series and parallel, we deliver custom 18650 battery packs tailored to your exact voltage and capacity needs—ideal for robust, cost-effective power solutions.
Custom Pouch Shape Pack
Our custom pouch cell packs break the limits of rectangular designs, enabling curved, L-shaped, circular, or ultra-thin batteries that fit seamlessly into innovative, space-constrained, and ergonomic products using flexible LiPo technology.
Our Custom Battery Assembly and Design Process
Our end-to-end process is designed for transparency, collaboration, and quality, ensuring we deliver a custom battery pack that meets your exact specifications and de-risks your project from start to finish.
Supply Chain Management & Cell Selection:
1. The process begins with quality. We source cells from audited manufacturers and conduct in-house qualification to verify consistency, performance, and reliability.
Custom Battery Design:
2. Our engineers define the electrical and mechanical requirements with your team, using 3D modeling to optimize form factor, thermal management, and structural integrity.
Custom Battery Management System (BMS):
3. We design and integrate a smart BMS for protection, cell balancing, fuel gauging, temperature monitoring, and communication with your device.
Custom Battery Assembly & Manufacturing:
4. In our controlled manufacturing facilities, trained technicians use laser welding and automated processes to assemble custom battery packs with consistent quality.
In-House Testing & Certification:
5. Every battery pack undergoes end-of-line functional testing. Our CNAS-accredited testing center supports standardized verification, while our engineers assist with applicable UL, IEC, and UN 38.3 requirements.
Custom Battery Packaging:
6. We design robust packaging to protect custom battery packs during storage and transport, ready for integration into your production line.
Quality, Testing, and Certification Capabilities
Quality Management System
OEM/ODM Services for Custom Battery Packs
Whether you have a complete design ready for production or need a full-service partner to develop a power solution from the ground up, Large Power has you covered. We offer comprehensive OEM (Original Equipment Manufacturer) and ODM (Original Design Manufacturer) services, providing the flexibility to meet your specific business needs and product development strategies.
Markets We Serve
Our expertise as a custom battery pack manufacturer is validated by our success in powering devices for the world’s most demanding industries.
Medical Equipment:
Delivering mission-critical reliability and safety for devices from portable patient monitors to surgical power tools.
Industrial Applications:
Engineering rugged, durable power solutions for industrial IoT, robotics, and backup power systems.
Defense and Aerospace:
Providing high-performance batteries that operate flawlessly in the most extreme and challenging environments.
Consumer Electronics:
Powering the next generation of innovative, high-performance consumer devices with optimized, compact batteries.
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