We engineer and manufacture custom lithium battery packs for eBikes, solar energy, industrial systems, and portable applications—tailored to your voltage, capacity, and BMS needs.
From triangle eBike packs to rack-mounted storage modules—fully certified, fully customizable.
Off-the-shelf batteries often fall short when your application demands specific voltage, power, dimensions, or interface protocols. Whether you’re developing an eBike brand, integrating battery storage for solar, or powering medical equipment—custom battery packs ensure safety, fitment, and long-term performance.
At Junda, we offer engineer-to-order solutions with in-house design, rapid prototyping, strict quality control, and full compliance support. Our team collaborates with product developers, procurement managers, and engineers across Europe and North America to deliver certified packs—on time, on spec, and ready to scale.
Our engineering team designs lithium battery packs based on your exact voltage, capacity, size, and application needs. Whether for e-bikes, industrial tools, or energy storage systems, we provide fully customized solutions—including BMS, connectors, and enclosure design—to match your technical and market requirements.
With streamlined in-house assembly and a well-managed supply chain, we ensure reliable lead times and on-time delivery—even for complex, high-volume orders. From prototyping to mass production, our team works efficiently to meet your project deadlines.
Every battery pack undergoes strict testing, including aging, insulation, and performance checks. Certified to international standards (ISO 9001, UN38.3, CE, UL), our products are built for long-term reliability—and we’re committed to solving any quality issues swiftly and professionally.
We design and manufacture custom lithium battery packs tailored to your exact specifications—from high-power cylindrical cells to solid-state and waterproof modules.
Versatile, proven, and widely available—perfect for general-purpose battery needs.
18650 packs remain a favorite for OEMs needing reliable, flexible, and cost-effective solutions.
✅ Panasonic, Samsung, LG cell options
✅ Easy to configure in various voltages/capacities
✅ Great for maintenance or drop-in replacements
Power-dense and compact, ideal for high-performance mobility.
21700 lithium battery packs deliver up to 50% more energy than 18650 packs in the same footprint, making them perfect for modern eBikes, power tools, and robotics.
✅ High discharge current support (10A–20A per cell)
✅ Long cycle life (>1000 cycles)
✅ Compact pack sizes for tight enclosures
Stable, safe, and long-lasting—best for energy storage.
LFP chemistry offers superior thermal stability and 3000+ cycles, making it the best fit for solar, RV, telecom, and marine storage.
✅ 12V / 24V / 48V options
✅ Prismatic, cylindrical, or modular form
✅ UL, CE, UN38.3 compliance ready
Engineered for safety, cost-efficiency, and exceptional performance in extreme environments.
Leveraging abundant sodium chemistry and thermally stable materials to ensure reliable operation in a wide temperature range from −40 °C to 100 °C.
✅ Safer chemistry – Low thermal-runaway risk and built-in flame resistance
✅ High-temp stability – >95% capacity at 50 °C; operates continuously up to 100 °C
✅ Cold-ready & fast-charging – >90% capacity at –20 °C; ~80% charge in 18 min
✅ Cost-effective & long-life – Abundant sodium, no cobalt/lithium, 1000s of cycles
Ultra-slim, ultra-light—designed for space-constrained devices.
LiPo packs can be shaped and layered into small, thin formats while supporting high peak current output.
✅ Ideal for drones, wearables, and RC devices
✅ Flexible dimensions and pouch thickness
✅ Built-in PCM or smart BMS available
Next-generation power with solid electrolyte safety.
Solid-state packs eliminate liquid electrolytes, offering ultra-safe, compact batteries for defense, medical, and cutting-edge applications.
✅ Ultra-safe chemistry
✅ Compact size with minimal swelling risk
✅ Currently available in low-volume prototype or special orders
Sealed for the elements, built for rugged use.
Our waterproof battery packs are IP65–IP68 rated, designed for outdoor, marine, and industrial mobility.
✅ Sealed housing + resin potting
✅ Anti-corrosion, shockproof
✅ Outdoor eBikes, fishing gear, mining equipment
Scalable, stackable power—built for flexibility.
Modular packs enable system integrators to build energy systems with parallel/series stacking, ideal for ESS, telecom, and industrial backup.
✅ 19” rack-mount compatible
✅ Parallel and serial configuration
✅ LCD, CAN/RS485 interfaces available
Engineered for extreme heat and harsh environments.
We use thermal-resistant materials and specialty cell chemistries to ensure safety and stability up to 85°C.
✅ Military-grade or industrial Li-ion cells
✅ High-temp insulation and flame-retardant casing
✅ Ideal for oil field, mining, under-hood applications
Custom lithium battery packs are tailor-made battery solutions engineered to meet specific voltage, capacity, and form factor requirements for various applications. These packs typically include custom-designed BMS, casing, and wiring tailored to the device or system.
Custom battery pack systems are widely used in:
Medical equipment
Industrial devices
Drones and UAVs
Robotic systems
Garden tools
Power tools
Electric vehicles
IoT and smart devices
Off-the-shelf packs have fixed specifications, while custom power packs are designed around your electrical, mechanical, and safety requirements. This ensures optimal performance, longer cycle life, and better integration into your system.
Yes. We provide custom LiPo battery packs with different cell configurations (e.g., 3S, 4S, 6S), capacities, and discharge rates. They are ideal for UAVs, RC devices, and compact electronics requiring lightweight, high-energy solutions
Absolutely. We design and produce custom pack battery systems for industrial devices with features like high-discharge rates, smart BMS integration, IP-rated casings, and high-temperature tolerance.
Yes. We specialize in custom battery packs for medical equipment, ensuring compliance with healthcare safety standards, including IEC certifications, with options for sterilizable casing and precise power calibration.
We offer:
Custom lithium-ion battery packs
Custom LiFePO4 battery packs
Custom solid-state battery development (on request)
Custom lithium polymer (LiPo) packs
Yes. Our custom built battery packs range from compact 500mAh units to high capacity custom battery packs exceeding 100Ah, used in e-bikes, robotics, and energy storage.
We offer full custom battery pack engineering, including:
Electrical schematic design
BMS configuration
CAD modeling
Thermal simulation
Compliance consulting (UN38.3, UL, CE)
Our custom battery pack assemblies meet global safety and transportation standards such as:
UN38.3
IEC 62133
UL 2054
CE / RoHS / REACH
Custom compliance per region (e.g., UKCA, BIS, etc.)
Concept to prototype: 2–4 weeks
Tooling & mass production: 3–6 weeks
Lead time varies based on complexity, certification needs, and order volume.
We can customize:
Voltage & capacity (e.g., 11.1V, 14.8V, 22.2V, etc.)
Dimensions & casing (plastic, aluminum, waterproof, etc.)
BMS (cell balancing, communication protocols)
Connectors & cables
Branding and labeling
Smart features (e.g., Bluetooth, CANbus, LED indicators)
Yes. As a custom battery pack manufacturer, we provide white-label and OEM services for brand owners, including packaging, logo printing, and NDA-secured development.
High energy density
Shock/vibration resistance
Intelligent BMS
Lightweight materials
High discharge rates
Enhanced runtime and torque
Weather-resistant housings
Overcurrent and over-discharge protection
Long lifecycle with fast charging options
From last-mile eMobility to off-grid storage—Junda battery packs are engineered to perform in the real world. Explore how our custom lithium battery solutions are used across industries that demand reliability, safety, and long-term performance.
The rise of eBikes and light electric vehicles has redefined urban commuting. Lithium battery packs provide the ideal balance of lightweight design, power density, and cycle longevity. eMobility applications demand high discharge performance (usually 1C–2C), intelligent BMS for cell balancing and safety, and robust housings for vibration resistance. Battery capacity typically ranges between 10Ah and 30Ah, with voltages like 36V, 48V, or 52V, depending on motor configuration and terrain adaptability. Waterproofing and fast charging options further enhance user satisfaction in urban and off-road environments.
Energy storage systems—both for residential and commercial use—rely heavily on lithium battery packs for stable, long-term energy retention. These systems are typically paired with solar or wind energy inputs, requiring batteries that support frequent charge/discharge cycles, low standby losses, and wide operating temperature ranges. The most common configuration is 48V or 51.2V using LiFePO₄ chemistry, with capacities ranging from 50Ah to over 200Ah per module. Features like battery modularity, stackability, and intelligent BMS (with RS485/ CAN communication) allow precise energy management, safety control, and scalability from homes to grid-scale installations.
UPS (Uninterruptible Power Supply) systems safeguard critical infrastructure—such as data centers, hospitals, and telecom facilities—by ensuring power continuity during outages. Lithium battery packs for UPS applications must deliver instant response (within milliseconds), stable voltage, and high reliability. Compared with lead-acid, lithium solutions offer smaller footprint, longer service life (3000+ cycles), and better heat tolerance. Typical voltages are 24V, 48V, or 96V, with capacity from 10Ah to 150Ah depending on backup duration requirements. For enterprise-grade setups, hot-swappable modules and smart BMS with real-time diagnostics are essential.
Cordless power tools rely on compact, high-drain lithium battery packs to deliver strong torque and long-lasting performance. These batteries must support high peak currents (up to 20A+), fast charging, and be rugged enough to withstand drops, dust, and vibration. Most tools use 18V or 21.6V packs based on 18650 or 21700 cylindrical cells, with BMS optimized for heat and overload protection. For industrial users, swappable battery packs reduce downtime, while fuel gauge LEDs and reinforced casings improve operator experience. The market prioritizes energy density, weight balance, and safety above all.
Wearable health devices demand lightweight, compact lithium batteries that provide consistent low-current output and extended runtime. Common use cases include heart monitors, insulin pumps, and portable ECGs. These batteries are typically pouch cell–based, rated 3.7V with capacities between 500mAh–3000mAh, and must meet strict safety and biocompatibility certifications (e.g. IEC 62133, UN38.3). Key requirements include low self-discharge, stable voltage, and soft-pack form factors that suit ergonomic designs. Integration with smart devices and Bluetooth modules also necessitates BMS with precise voltage regulation.
Mobile systems such as patient monitoring carts, portable ultrasound machines, and ventilators require high-capacity lithium batteries that deliver stable power across long shifts. These systems favor 24V or 36V packs built with Li-ion or LiFePO₄ cells, capacities ranging from 10Ah to 40Ah. Medical-grade BMS is essential to ensure fault detection, thermal control, and redundancy. Hospitals also prioritize silent operation, battery hot-swap ability, and certifications for medical electrical safety (IEC 60601). Long cycle life and clean integration into enclosure cabinets are top design priorities.
Modern agriculture is transforming with the rise of electric drones and smart farming equipment. Agricultural drones require lightweight yet high-capacity lithium battery packs capable of high discharge (5C–10C) to support lift, hover, and spray functions. Most use 6S–12S packs (22.2V to 44.4V) with capacities from 10Ah to 30Ah, often based on 21700 or pouch cells. Fast charging and modular replacement allow field workers to minimize downtime during operations. For ground-based autonomous machines, LiFePO₄ batteries offer long cycle life, weather tolerance, and GPS + sensor integration for precision farming.
Telecom base stations—especially in off-grid or remote regions—depend on lithium battery packs to maintain uninterrupted signal transmission during blackouts or grid instability. These battery systems must handle deep discharge, extreme temperatures, and long standby periods. LiFePO₄ batteries (48V, 51.2V, or 96V) are commonly used, with capacities ranging from 50Ah to 200Ah per rack. Systems typically integrate solar power and require intelligent BMS with RS485/CAN interfaces for remote monitoring. High energy density, fire safety, and long service life (4000+ cycles) make lithium the top choice over lead-acid alternatives.
With more than a decade of experience, Junda delivers precision-engineered lithium battery packs tailored for your unique applications. Here’s what makes us a trusted partner for global B2B clients:
At Junda, our engineering team is led by a senior battery architect with 15+ years of hands-on experience at CATL, BYD, and other industry leaders. Backed by a cross-functional team of 6 engineers, we provide full-cycle development from design and simulation to testing and certification. We’ve completed over 1,000 custom battery pack projects across sectors like eMobility, energy storage, medical devices, and industrial tools—always focusing on safety, reliability, and performance.
Junda operates under a strict ISO 9001:2015-certified quality management system, overseen by our QA director and implemented across every department. From incoming cell inspection to final pack aging tests, every step is digitally tracked and traceable. Our system ensures stable supply chain sourcing, controlled assembly processes, and compliance with industry benchmarks such as UN38.3, CE, and IEC 62133.
Junda’s battery pack assembly process integrates mechanical, electrical, and thermal design tailored to your use case. Our capabilities include IP67/IP68 waterproof housing, high-discharge BMS systems, CAN/RS485 communication protocols, and reinforced designs for vibration or extreme environments. We conduct cell sorting, welding, insulation, balancing, and aging tests in-house to ensure consistent performance and longevity.
From your first inquiry to final delivery, we provide responsive, multilingual support backed by a dedicated sales and engineering team. We guide clients through technical evaluation, prototyping, compliance, and logistics—ensuring a transparent, stress-free experience. Whether you need an urgent sample or a long-term OEM solution, we’re here to make your battery development process efficient and reliable.
Share your voltage, size, application, and quantity needs—we’ll assess your project quickly.
Our engineers will optimize the design, confirm details, and provide samples if needed.
Once approved, we start production and arrange fast, secure shipping to your destination.
Need a custom lithium battery pack? Just send us your specs—we’ll help you choose the right voltage, case, and configuration for your application.
At JUNDA, we make customization easy. Follow these 3 simple steps to start today:
Send your battery requirements — voltage, capacity, casing type, or upload drawings/photos.
We’ll evaluate your specs and recommend the best configuration. A detailed quote will be sent within 24 hours.
After approval and deposit, we start production. Shipping and tracking will be arranged for fast, secure delivery.
