When you need a reliable power source for equipment with demanding energy requirements, choosing the right 21700 battery pack can directly affect operating time, system compatibility, and maintenance costs. However, selecting a battery involves more than comparing voltage and capacity. You also need to consider cell configuration, discharge requirements, connector type, physical dimensions, and battery management.
The Defond 21700-8S3P-28.8V-15000mAh battery pack combines 21700 cylindrical cells into a compact lithium-ion battery assembly with a rated voltage of 28.8V and an energy capacity of 432Wh. Developed with SunPower battery cells, this configuration offers a practical option for equipment manufacturers evaluating rechargeable battery systems for industrial and specialized applications.
What Makes a 21700 Battery Pack Suitable for High-Capacity Applications?
A 21700 battery pack uses cylindrical lithium-ion cells measuring approximately 21mm in diameter and 70mm in length. Compared with smaller cylindrical cell formats, 21700 cells can provide higher individual cell capacity, making them suitable for battery assemblies that require substantial energy storage within a limited space.
For equipment manufacturers, this cell format offers several advantages:
- High cell capacity: The 21700-5000 cell used in this model has a nominal capacity of 5,000mAh.
- Flexible configurations: Series and parallel connections allow manufacturers to customize voltage and capacity.
- Compact integration: Cylindrical cells support structured battery pack designs.
- Rechargeable performance: Lithium-ion technology supports repeated charging and discharging.
- Custom engineering: Cell selection, BMS configuration, and PACK design can be adjusted according to application requirements.
For industrial equipment and drone-related power systems, these characteristics make 21700 cells worth evaluating when balancing energy capacity, weight, and installation space.
Defond 21700-8S3P Battery Pack Specifications
The Defond 21700 battery pack combines eight series-connected groups with three parallel cells in each group. This 8S3P configuration contains 24 individual 21700 cells.
Based on a nominal cell voltage of 3.6V and a capacity of 5Ah per cell, the configuration provides a nominal voltage of 28.8V and a total capacity of 15Ah.
Product Specifications
| Parameter | Specification |
|---|---|
| Model | 21700-8S3P-28.8V-15000mAh |
| Battery Type | Lithium-ion |
| Cell Format | 21700 Cylindrical |
| Cell Model | 21700-5000 |
| Cell Brand | SunPower |
| Configuration | 8S3P |
| Nominal Voltage | 28.8V |
| Battery Capacity | 15,000mAh (15Ah) |
| Energy Capacity | 432Wh |
| Connector | XT90 |
| Dimensions | 78 × 41 × 167mm |
Understanding the 8S3P Configuration
The battery configuration determines its electrical characteristics:
- 8S (Eight in Series): Eight cell groups connect in series, producing a nominal pack voltage of 28.8V.
- 3P (Three in Parallel): Three 5Ah cells connect in parallel within each group, providing 15Ah capacity.
- Total Cell Count: Eight groups multiplied by three cells equals 24 cells.
The resulting energy capacity is calculated as:
28.8V × 15Ah = 432Wh.
This configuration provides a useful reference when evaluating battery compatibility with equipment requiring a 28.8V nominal power supply.
Applications of a 28.8V 15Ah Lithium Battery Pack
A 432Wh battery pack can support different equipment categories depending on power consumption, discharge requirements, and system design. Before selecting a battery, you should verify the required operating voltage, peak current, continuous current, and available installation space.
Potential application areas include:
Drone and UAV Power Systems
Drone manufacturers need to balance battery capacity, weight, discharge capability, and flight duration. A 21700 lithium ion battery pack may be considered for selected UAV platforms where its voltage and physical configuration match the electrical design.
However, actual flight time depends on aircraft weight, motor efficiency, payload, flight conditions, and power consumption.
Industrial Inspection Equipment
Power inspection equipment often operates in environments where stable power delivery and reliable battery integration matter. Battery selection should account for operating temperature, load variations, and the required working duration.
Emergency Response Equipment
Portable equipment used in emergency response may require dependable rechargeable power. A 432Wh battery pack offers a defined energy capacity for engineers to assess against equipment consumption and backup requirements.
Other Customized Equipment
The 28.8V configuration may also be evaluated for specialized industrial devices and portable electrical systems. Compatibility depends on connector design, current requirements, protection functions, and mechanical installation conditions.
21700 Battery Pack vs. Other Battery Configurations
Choosing a battery configuration requires understanding how different cell formats and connection arrangements affect system design.
| Comparison Factor | 21700 8S3P | 18650 Battery Pack | Custom Battery Configuration |
|---|---|---|---|
| Cell Format | 21700 cylindrical | 18650 cylindrical | Application-dependent |
| Cell Capacity | 5Ah per cell in this model | Depends on selected cell | Customizable |
| Configuration | 8S3P | Application-dependent | Application-dependent |
| Nominal Voltage | 28.8V | Depends on cell arrangement | Customizable |
| Energy Capacity | 432Wh | Depends on configuration | Customizable |
| Main Consideration | Capacity and packaging | Cell availability and dimensions | System compatibility |
The 21700 format is worth considering when you need higher-capacity cylindrical cells. However, the best option depends on your equipment’s power requirements, weight limitations, installation space, and budget.
How to Select the Right Custom 21700 Battery Pack
Before purchasing a 21700 battery pack for your equipment, follow these steps to reduce compatibility risks and simplify product development.
Step 1: Define the Electrical Requirements
Identify your equipment’s nominal voltage, operating current, peak discharge current, and required energy capacity. These values determine the appropriate cell configuration.
Step 2: Confirm the Battery Dimensions
Check the available installation space and compare it with the battery’s dimensions of 78 × 41 × 167mm. Also verify connector positioning and cable clearance.
Step 3: Evaluate BMS Requirements
A battery management system (BMS) helps monitor and protect the battery pack. Discuss overcharge protection, over-discharge protection, overcurrent protection, temperature monitoring, and balancing requirements with your battery manufacturer.
Step 4: Confirm Cell and Discharge Performance
Request the cell datasheet and battery test results. Confirm continuous and peak discharge current, operating temperature, cycle life, and charging requirements before finalizing the design.
Step 5: Review Samples and Production Requirements
For customized projects, evaluate engineering samples before mass production. Confirm connector compatibility, mechanical dimensions, electrical performance, and quality inspection requirements.
Why Choose Shenzhen Defond Technology Co., Ltd.?
Shenzhen Defond Technology Co., Ltd. specializes in integrated drone battery solutions covering customized cells, self-developed chip-level BMS, and PACK manufacturing.
Founded in 2016 and headquartered in Shenzhen, Defond combines battery engineering and manufacturing capabilities to support consumer and industrial drone projects.
Key advantages include:
- Full-chain development: Integrated capabilities across battery cells, BMS, and PACK.
- Research and development: Technical teams support battery design, product development, and performance optimization.
- Quality management: ISO9001 and ISO14001 certified management systems.
- International experience: Solutions supplied to customers in more than 30 countries and regions.
- Flexible manufacturing: Production capabilities supporting small-batch development and larger-volume orders.
- Application experience: Battery solutions developed for agriculture, power inspection, and emergency response applications.
With its engineering and manufacturing resources, Defond works with equipment manufacturers to evaluate battery configurations and develop solutions based on specific technical requirements.
FAQ
Q1: What Does 8S3P Mean in a 21700 Battery Pack?
8S3P means eight cell groups connected in series, with three cells connected in parallel in each group. Using 3.6V, 5Ah cells, this arrangement provides 28.8V nominal voltage and 15Ah capacity.
Q2: How Much Energy Does a 28.8V 15Ah Battery Pack Provide?
The battery provides 432Wh of nominal energy, calculated by multiplying 28.8V by 15Ah. Actual usable energy depends on the discharge conditions, BMS settings, and operating environment.
Q3: Can Defond Customize a 21700 Battery Pack for Drone Applications?
Yes. Defond provides integrated battery development covering cells, BMS, and PACK manufacturing. You can discuss voltage, capacity, discharge current, dimensions, connectors, and protection requirements with its engineering team to determine a suitable configuration.
Conclusion
Selecting the right 21700 battery pack requires more than choosing a high-capacity cell. You need to evaluate voltage, energy capacity, discharge performance, physical dimensions, and BMS compatibility to ensure the battery meets your equipment’s operating requirements.
The Defond 21700-8S3P-28.8V-15000mAh model provides 28.8V nominal voltage, 15Ah capacity, and 432Wh energy in a 21700 cylindrical cell configuration. With integrated cell, BMS, and PACK development capabilities, Shenzhen Defond Technology Co., Ltd. can support your evaluation of customized lithium-ion battery solutions.
Looking for a custom 21700 battery pack for your next project?
Contact Defond with your required voltage, capacity, discharge current, application, and estimated order quantity. Its engineering team can help assess the battery configuration and discuss suitable OEM/ODM development options.
Visit Defond official website to submit your project requirements and request a quotation.