We customize lithium battery packs tailored to your voltage, size, protocol, and application—unlocking smarter, safer, and longer-lasting energy for every industry.
Every application has its own unique power demands—and using generic lithium battery packs can lead to overheating, premature failure, or integration headaches. Whether you’re building high-performance tools, compact medical devices, or outdoor energy systems, a customized lithium battery solution ensures the battery fits your product, your environment, and your safety standards—not the other way around.
At Junda, we don’t just sell batteries—we co-engineer them with you. From voltage and size to communication protocol and thermal management, we build each pack to help you deliver smarter, safer, and longer-lasting power in your specific field.
It’s a tailor-made battery designed to fit your device’s specific requirements—voltage, capacity, shape, BMS protocol, safety standards, and integration needs.
When your application has unique space constraints, requires special voltage/current performance, must pass region-specific certifications, or needs smart communication protocols like CAN or UART.
We’ll need your desired voltage and capacity, physical dimensions, peak and continuous current, operating temperature, communication interface, and any required certifications.
Most custom packs take 25–40 days from design to delivery, including prototyping, testing, and final production. Faster timelines are possible for urgent projects.
Yes. We offer BMS with CAN, RS485, UART, and custom firmware to match your application’s logic and monitoring systems.
Absolutely. We provide reverse engineering and improved replacements for discontinued or obsolete packs, with better safety and cycle life.
We work with NMC, LiFePO₄, LCO, and LTO chemistries—selected based on your project’s safety, energy density, or temperature resistance needs.
Yes—when properly designed with quality materials and BMS protection. Certifications like UN38.3, CE, and UL also help ensure compliance and safety for transport and use.
We support CE, UN38.3, UL, IEC62133, MSDS, RoHS, and other compliance standards based on your target market.
We offer functional prototypes for testing and evaluation before scaling up to production.
Most off-the-shelf lithium battery packs are made to serve the average. But your application isn’t average—it has precise voltage, space, safety, and communication needs. A drone doesn’t power like a handheld tool. A medical sensor can’t tolerate what an electric bike can.
That’s where custom lithium batteries come in.
By designing your battery pack around your actual device architecture and usage environment, you gain:
Seamless mechanical fit – no more modifying enclosures to fit oversized packs
Optimized power delivery – matched to your required voltage, current, and runtime
Protocol compatibility – CAN, UART, RS485, SMBus, and more
Certified compliance – ready for CE, UL, UN38.3, MSDS and beyond
Durability in the field – from -30°C cold chains to high-impact tools
At Junda, we don’t believe in one-size-fits-most. We co-develop each pack with our partners—engineering a solution that delivers safety, efficiency, and lifetime value.
Whether you’re building a fleet of autonomous robots or a single batch of next-gen IoT devices, we start with your blueprint—not our stock shelf.
Customized lithium battery packs are engineered to meet specific requirements in size, voltage, current, communication, safety, and performance.
Unlike off-the-shelf batteries, custom solutions are tailored through collaborative design to align with your device architecture, application demands, and regional regulations. They’re common in sectors like medical devices, robotics, military, and energy storage.
If your product isn’t average, your battery shouldn’t be either.
There’s a point in product development where off-the-shelf batteries just don’t cut it. Maybe your device has a curved casing. Maybe your board requires a UART protocol, but the battery speaks only SMBus. Or maybe you’re shipping to Europe and need CE compliance baked in.
If you’ve encountered these real-world issues, it’s time to go custom:
| Application Case | Why Standard Packs Don’t Work | Customization Needed |
|---|---|---|
| Surgical Handheld Tool | Needs miniaturized dimensions and fast recharge | Custom size, high-rate cells |
| Solar Power Storage | Requires BMS with remote monitoring | Smart BMS + CAN/RS485 |
| Cold Chain Logistics | Operates in -30°C conditions | Low-temp cells + insulation |
We don’t ask your device to adapt to the battery. We design the battery to fit your device. 
Customization isn’t just a checkbox—it’s the heart of product reliability. Every application has its own logic, load curve, casing geometry, and compliance challenge. That’s why our battery engineering starts with questions like:
Once we understand your application, we tailor the battery at multiple levels:
Physically:
We match the mechanical shape—flat, slim, L-shaped, modular stackable.
We adjust the connector interface—XT60, Molex, magnetic pogo pins, or sealed aviation plugs.
We design the casing—ABS for cost, aluminum for strength, PC+IP67 for field exposure.
Electrically:
We define the cell configuration—18650s for cost, 21700s for energy density, or LiFePO₄ for long cycle life.
We set your voltage and capacity—from 3.7V 2Ah micros to 48V 100Ah industrials.
We select your BMS platform—with protection settings, discharge thresholds, SOC display, and even remote firmware updates.
Digitally:
We implement your communication protocol—CAN, RS485, UART, I²C, SMBus—ready to talk to your logic board.
We write custom BMS firmware—including custom CAN ID maps, EEPROM data structure, and alerts.
We provide data sheets, QR-coded serial tracking, and OTA support if needed.
Whether your priority is mechanical fit, smart data exchange, or certification-readiness—we’ll build the pack around your priorities, not ours.
And that’s why over 80% of our clients come to us when “off-the-shelf” leads to delays, malfunctions, or test failures.
There’s no such thing as a “universal” battery architecture. Each use case tells a different story.
In custom battery engineering, architecture means how the cells, BMS, communication, and mechanical housing are arranged to support your product’s operating logic.
Let’s explore three common types we design:
Scenario
Used in cordless power tools, e-scooters, or industrial handheld devices requiring 15A–40A burst current.
Key Architecture
Cell format: 18650 or 21700 NMC
Configuration: 10S2P or 13S3P for 36V–48V
BMS: Integrated MOS protection + hardware current limiter
Interface: XT60 or Anderson plug
Thermal Management: Copper or aluminum heat plate
Shell: Flame-retardant ABS with impact resistance
Why Custom?
Generic packs overheat or trip under torque. Ours handles sustained high current + short bursts with stable voltage curve.
Scenario
Used in portable ultrasound devices, diagnostic monitors, or surgical handles—where compact size and protocol compliance matter most.
Key Architecture
Cell format: High-density Li-ion pouch
Configuration: 1S1P or 2S1P
BMS: Compact board with full protection and data logging
Interface: Micro connector + magnetic contact
Communication: SMBus or I²C with checksum integrity
Shell: Curved, skin-contact-safe PC material, sterilizable coating
Why Custom?
Standard batteries are too bulky or uncertified. This pack fits flush inside ergonomic casings and logs full cycle data for hospital compliance.
Used in off-grid solar systems, telecom backup, or camping power banks with scalability and long cycle life.
Key Architecture
Cell format: LiFePO₄ prismatic
Configuration: 16S1P or 16S2P (51.2V system)
BMS: With RS485 / CAN protocol for string expansion
Interface: Aviation-style waterproof connectors
Shell: Aluminum casing with vent, stackable groove design
Additional: SOC display + passive balancing module
Why Custom?
Clients want modular expansion, hot-swap connectors, and real-time monitoring—all within CE/UL/UN38.3 certified structure.
Tools → raw power + durability
Medical → compact safety + traceability
Energy → modularity + serviceability
That’s why we don’t offer “standard products.” We engineer standard-setting power solutions—based on how your device actually works.
1. Requirements Collection
We begin with your specs:
Target voltage/capacity
Max load current / pulse current
Mechanical limits (L×W×H)
Communication protocol (CAN, UART, SMBus…)
Target market (EU/US/MENA)
We provide a design intake form or accept your technical drawing.
2. Electrical Architecture & Cell Selection
Based on your current curve, cycle life needs, and form factor, we recommend:
Cell type (NMC, LFP, LCO…)
Configuration (e.g., 10S2P)
Nominal/charge voltage
Discharge C-rate matching
3. BMS Platform Matching
We select a BMS (hardware + firmware) aligned with your:
Load profile
Protection logic
Communication needs
Data storage/logging requirements
Custom firmware CAN IDs or RS485 addresses can be programmed at this stage.
4. Mechanical Design & Connector Planning
This phase finalizes:
Shell structure (curved, compact, modular)
Port orientation, connector compatibility
Waterproof / fire-retardant rating (IP54, IP67, UL94-V0)
We’ll send a full CAD 3D model + interface mockup for your mechanical team to confirm.
5. Functional Prototype Build
We assemble and test a working prototype under:
Constant current load
Vibration and short circuit stress
Firmware communication simulation
Initial certification pre-check (e.g., UN38.3 pretest)
You receive a fully functional demo unit.
6. Validation Testing
You test it in your system. We adjust firmware, wiring, connectors, or PCB layout if needed. This stage may involve:
Temperature behavior logging
Protocol decoding
Charger compatibility testing
7. Certification & Documentation Support
We assist with:
UN38.3 / IEC62133 testing
CE / UL / MSDS / RoHS / REACH
Labeling formats, safety datasheets, DoC
If required, we work directly with 3rd-party labs on your behalf.
8. Final Production & Shipping
Once approved, we:
Assemble via our automated or manual line (based on pack type)
Apply batch codes and QA inspection seals
Package for sea/air shipment with DG handling label
Shipping is handled via your forwarder or ours. We support EXW, FOB, CIF, DDP terms.
Our smart BMS supports protocols like CAN Bus, RS485, UART, and SMBus, allowing seamless connection to your host controller. Whether you need real-time data, system alerts, or remote monitoring, we configure the battery to your needs.
What’s included:
Protocol matching – CAN ID mapping, RS485/Modbus setup
Custom firmware – Charge/discharge logic, protection settings
Diagnostics – Voltage, current, SOC, cell-level data
Host compatibility – STM32, PLC, Raspberry Pi, apps, etc.
Optional features – Bluetooth, OTA, audible/LED alerts
You give us your spec—we deliver a plug-and-play pack that talks to your system.
Before any battery pack leaves our facility, it’s validated against global transport laws, regional safety regulations, and real-world performance stress. From UN38.3 to IP67, we make sure your pack works—not just on paper, but on site.
| Test / Certification | Required For | Applies To |
|---|---|---|
| UN38.3 | Global transport (Air & Sea) | All lithium battery packs |
| IEC 62133 | CE/CB certification, India BIS | Consumer & industrial battery packs |
| UL 1642 / UL 2054 | US compliance, product liability | Embedded battery modules |
| IP67/IP68 | Outdoor/wet use products | Tools, e-mobility, smart sensors |
| QA Stage | Test Item | When Performed |
|---|---|---|
| Incoming QC | Cell sorting, internal resistance, batch trace | Before cell storage |
| Inline QC | Welding, BMS wiring, voltage consistency | During assembly |
| Final QC | Charge test, protocol test, current limit check | Before packaging |
| Random Sampling | Cycle life simulation, vibration/thermal test | Weekly per model |
Deep Testing Available (for critical use)
Cycle life simulation (up to 1000+ cycles)
High-temp and low-temp discharge
Short-circuit & overcharge resistance
Communication protocol signal stability
IPX4 to IPX8 waterproofing (on request)
Different markets require different certifications. For Europe, we support CE, UN38.3, IEC 62133, RoHS, and REACH. In the U.S., we help prepare UL1642/2054, MSDS, and transport labeling. For Australia and the Middle East, we provide C-Tick, ERAC, G-Mark, and SASO documentation.
From sample submission to lab testing, to final DoC, labeling, and QR-coded MSDS, we manage the entire process for you—so you stay focused on launching your product.
| Category | Options |
|---|---|
| Cell Type | Cylindrical, Prismatic, Pouch, LFP, NMC |
| Voltage/Capacity | Custom combinations, series-parallel layouts |
| Form Factor | L-shape, thin packs, curved packs |
| BMS & Protocols | UART, RS485, CAN, SMBus, I²C |
| Connector/Interface | XT60, Molex, Anderson, aviation plugs |
| Casing Material | ABS, PC, metal shell, IP67 waterproof |
| Label & Branding | Custom logo, compliance label, barcodes |
Lithium batteries power everything from eBikes to energy storage systems, but choosing and using them wisely requires more than just knowing the voltage. This guide has walked you through the essentials—from battery cell types, chemistry, and internal structures, to smart BMS systems, testing methods, certifications, lifespan strategies, and safe handling. Whether you’re a buyer, engineer, or brand owner, understanding these fundamentals helps you select safer, more efficient, and fully compliant battery solutions tailored to your application. At the core, it’s not just about batteries—it’s about making smarter, longer-lasting energy decisions.
| Region | Standards We Support |
|---|---|
| Europe | CE, UN38.3, REACH, RoHS |
| USA | UL1642, UL2054, DOT, MSDS |
| Australia | C-Tick, ERAC |
| Middle East | G-Mark, SASO |
Customized lithium battery solutions unlock unmatched performance, safety, and market readiness. By tailoring every aspect—from chemistry and shape to BMS logic and branding—you gain full control over power delivery in your device. Whether you’re innovating in robotics, transportation, or IoT, custom packs are the smart way forward.
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.
