| Configuration | Capacity (Ah) | Energy (Wh) | Typical Size (mm) | Weight |
|---|---|---|---|---|
| 4S1P | 4.5–5Ah | ~66–74Wh | ~22×70×85 | ~200g |
| 4S2P | 9–10Ah | ~133–148Wh | ~45×70×85 | ~400g |
| 4S3P | 13.5–15Ah | ~200–222Wh | ~65×70×95 | ~600g |
| 4S4P | 18–20Ah | ~266–296Wh | ~85×70×95 | ~800g |
14.8V 21700 battery pack that provides high-capacity power solutions for medical devices, cleaning devices, and diving systems.
Junda offers high-performance 4S 14.8V 21700 lithium battery packs designed for reliability and long runtime. These battery solutions are well-suited for medical devices, cleaning equipment, diving systems, and RC & FPV applications. Compared to standard 4S 18650 packs, the 21700 version delivers higher energy density and stronger discharge performance.
The 4S 14.8V 21700 lithium battery pack delivers higher voltage and extended runtime, making it ideal for demanding industrial, medical, and drone applications. Understanding its specifications, capacity options, and typical uses can help you choose the most suitable configuration for your project. Explore the details below to match your exact requirements.
| Parameter | Specification |
|---|---|
| Battery Type | 4S 14.8V 21700 Lithium-ion Battery Pack |
| Nominal Voltage | 14.8V |
| Nominal Capacity | 12–20Ah (depending on configuration) |
| Energy | ~177–296Wh |
| Standard Charge Voltage | 16.8V |
| Cut-off Discharge Voltage | ~12.0V |
| 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 |
|---|---|---|---|---|
| 4S1P | 4.5–5Ah | ~66–74Wh | ~22×70×85 | ~200g |
| 4S2P | 9–10Ah | ~133–148Wh | ~45×70×85 | ~400g |
| 4S3P | 13.5–15Ah | ~200–222Wh | ~65×70×95 | ~600g |
| 4S4P | 18–20Ah | ~266–296Wh | ~85×70×95 | ~800g |
| Capacity Range | Common Applications |
|---|---|
| 4.5–5Ah | Portable medical equipment, small monitoring devices, IoT systems |
| 9–10Ah | Inspection tools, medium-size industrial instruments, communication equipment |
| 13.5–15Ah | Power tools, professional drones, robotics, field testing equipment |
| 18–20Ah | High-drain industrial devices, large communication systems, heavy-duty portable machines |
Built with trusted global brands such as BAK, Samsung, LG, and Panasonic to ensure stable performance.
Delivers up to 30% more capacity than 18650-based packs, giving your devices extended runtime.
Multiple capacities, discharge rates, and connector types like XT30 and DC ports are available for diverse applications.
LED button for state-of-charge monitoring using Q78350 or BQ76930 chip solutions.
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.
4S1P 59.2Wh
Suitable for LED lighting systems, bike lights, and sweeping machines
Higher capacity option to replace 4S1P 18650 li-ion battery packs
4S4P 296Wh
Designed for RC and FPV applications
Compact and lightweight compared to LiPo packs of the same capacity
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.