| Configuration | Capacity (Ah) | Energy (Wh) | Typical Size (mm) | Weight |
|---|---|---|---|---|
| 12S1P | 4.5–5Ah | ~194–216Wh | ~22×70×250 | ~480g |
| 12S2P | 9–10Ah | ~388–432Wh | ~45×70×250 | ~960g |
| 12S3P | 13.5–15Ah | ~582–648Wh | ~65×70×260 | ~1440g |
| 12S4P | 18–20Ah | ~776–864Wh | ~85×70×260 | ~1920g |
IP68 waterproof 43.2V battery pack built with 21700 cells (Samsung/LG) for -40°C performance. Powers electric surfboards and drones reliably.
For high-performance applications like drones, underwater equipment, and electric surfboards—where power density and environmental resilience are critical—battery systems must deliver both outstanding performance and seamless compatibility with your equipment.
Junda offers fully customized 43.2V 21700 lithium battery solutions, covering cell selection, structural design, BMS configuration, and enclosure customization to ensure a perfect fit for professional-grade applications.
The 43.2V (12S) 21700 lithium battery pack delivers high voltage and energy output, making it ideal for electric bikes, heavy-duty scooters, robotics, and industrial equipment. Reviewing its specifications, capacity options, and application scenarios will help you choose the most suitable configuration for your project. Explore the detailed information below to find the right match for your requirements.
| Parameter | Specification |
|---|---|
| Battery Type | 12S 43.2V 21700 Lithium-ion Battery Pack |
| Nominal Voltage | 43.2V |
| Nominal Capacity | 12–20Ah (depending on configuration) |
| Energy | ~518–864Wh |
| Charge Voltage | 50.4V |
| Cut-off Voltage | ~36V |
| Continuous Discharge Current | 15A–60A |
| Peak Discharge Current | 30A–80A |
| Operating Temperature | Charge: 0–45℃ / Discharge: -20–60℃ |
| Cycle Life | >500 cycles @ 80% DOD |
| Configuration | Capacity (Ah) | Energy (Wh) | Typical Size (mm) | Weight |
|---|---|---|---|---|
| 12S1P | 4.5–5Ah | ~194–216Wh | ~22×70×250 | ~480g |
| 12S2P | 9–10Ah | ~388–432Wh | ~45×70×250 | ~960g |
| 12S3P | 13.5–15Ah | ~582–648Wh | ~65×70×260 | ~1440g |
| 12S4P | 18–20Ah | ~776–864Wh | ~85×70×260 | ~1920g |
| Capacity Range | Common Applications |
|---|---|
| 4.5–5Ah | E-bikes, light scooters, portable industrial devices |
| 9–10Ah | Electric tools, medium-size mobility equipment, AGVs |
| 13.5–15Ah | Professional e-bikes, robotics, testing instruments |
| 18–20Ah | Heavy-duty scooters, industrial backup power, logistics robots |
Built for extreme environments, supporting -40°C operation, high discharge rates, impact resistance, and IP68 waterproofing.
Options include Samsung 40T, Molicel P42A/P45B, or LG 21700 cells for high power output and long cycle life.
Meets UN38.3, CE, RoHS, and IEC standards; certification support available.
Real-time monitoring with protections for overcharge, overcurrent, and temperature.
Junda is a professional lithium battery manufacturer, supplying certified battery solutions worldwide. Product standards are continuously improved to help you maintain reliable supply and keep your customers satisfied.
Configuration: 12S1P with 12x INR21700-P42A cells
Operating Temperature: -20°C to 55°C
IP68 waterproof protection for marine use
Built with INR21700-P42A cells in series-parallel configuration
XT90 connector for discharge and XT60 connector for charging
Designed for high-discharge drone applications
Built with Samsung INR21700-40T cells
Enhanced heat dissipation and IP68 waterproof rating
Custom waterproof housing and connector solutions
21700 cells are larger and offer higher energy density than 18650, making them ideal for applications that require longer runtime, fewer cells, or better thermal management.
Yes. We support A-grade 21700 cells from brands like Samsung, LG, EVE, and Lishen. You can specify your preferred brand or let us recommend one based on your cost–performance needs.
Absolutely. We offer both hardware and smart BMS options with support for CAN, UART, RS485, Bluetooth, and custom firmware integration.
UN 38.3 is required for transport. Depending on the market, you may also need CE (EU), UKCA (UK), IEC 62133, MSDS, RoHS, or UL. We provide full support.
Samples: 7–12 working days
Mass production: 15–25 days
Lead time may vary based on complexity, cell availability, and customization level.
Yes. We offer small-batch prototyping (usually 5–100 pcs) to help you test form, fit, and function before scaling up.
Yes. We provide custom labels, logo printing, box packaging, and barcode integration to support your supply chain and brand visibility.
You should include target voltage, capacity, discharge current, size limits, connector type, BMS protocol, certification needs, and annual quantity estimates.
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.