The 21700 50SE rechargeable battery is designed for UAV systems where unstable power output can interrupt operations and reduce efficiency. You often face issues like short flight time, weak discharge performance, or overheating under load.
21700 50SE rechargeable battery 5000mAh from Defond solves these challenges with a stable 20A continuous discharge structure. In addition, it supports extreme environment operation from -20°C to 60°C, which makes it suitable for industrial drone applications.
Moreover, Defond integrates cell, BMS, and PACK development into a full-chain system, which ensures better consistency and higher reliability in real-world use.
High-Performance Structure of 21700 50SE Lithium Cell
The 21700 50SE rechargeable battery uses optimized lithium-ion chemistry to improve both energy density and discharge stability. As a result, it performs well under continuous load conditions.
Key specifications include:
- Capacity: 5000mAh
- Nominal Voltage: 3.6V
- Continuous Discharge Current: 20A
- Pulse Discharge Current: 90A (2s)
- Operating Temperature: -20°C to 60°C
In addition, Defond applies ISO9001 and ISO14001 standards to ensure stable production quality across all batches.
Why 21700 50SE Rechargeable Battery Fits Drone Applications
You need a battery that supports both endurance and burst power. Therefore, the 21700 50SE rechargeable battery is widely used in UAV systems.
Typical applications include:
- Agricultural spraying drones
- Power inspection UAV platforms
- Emergency rescue drones
- Industrial surveillance systems
Meanwhile, its high discharge rate supports stable lift power during flight, especially in heavy-load scenarios.
21700 50SE vs Standard 21700 Battery Comparison
| Feature | 21700 50SE | Standard 21700 Cell |
|---|---|---|
| Capacity | 5000mAh | 4000mAh |
| Continuous Discharge | 20A | 10–15A |
| Pulse Output | 90A | 30–60A |
| Temperature Range | -20°C to 60°C | 0°C to 45°C |
| UAV Suitability | High | Medium |
Compared with standard cells, the 21700 50SE rechargeable battery delivers stronger high-current support and better environmental adaptability.
Manufacturing Process by Defond
Defond follows a structured production system to ensure reliability and safety.
Step 1: Material Selection
First, high-purity lithium materials are selected to improve cycle stability.
Step 2: Cell Manufacturing
Next, automated production lines control electrode coating accuracy and consistency.
Step 3: BMS Integration
Then, chip-level BMS is tested for overcharge, over-discharge, and thermal protection.
Step 4: PACK Testing
After that, vibration and load simulations validate real-world performance.
Step 5: Certification Control
Finally, every batch follows ISO9001 and ISO14001 quality systems for compliance.
Engineering Strength Behind Defond Battery Systems
Defond invests heavily in R&D and global innovation centers.
For example:
- Headquarters laboratory investment: 122 million RMB
- Jiangsu Competitiveness Lab: 90 million RMB
- North America R&D Center (QUBE) for advanced lithium research
In addition, Defond employs more than 100+ technical researchers, including doctors and senior engineers. As a result, the company continuously improves energy density and system safety.
Key Advantages of 21700 50SE Rechargeable Battery
You benefit from multiple performance advantages:
- Full-chain integration: Cell + BMS + PACK
- Stable high drain output for UAV systems
- Long cycle life under industrial conditions
- Fast OEM customization support
- Scalable production for global demand
Therefore, this battery is not just a cell, but part of a complete energy solution.
FAQ
1. Is the 21700 50SE rechargeable battery suitable for high-drain drones?
Yes, it supports 20A continuous discharge and is designed for UAV high-load systems.
2. Can Defond provide customized battery packs?
Yes, Defond offers OEM/ODM services including PACK design and BMS integration.
3. What certifications does Defond have?
Defond follows ISO9001 and ISO14001 certified production systems.
Conclusion
The 21700 50SE rechargeable battery delivers a strong balance of 5000mAh capacity, high discharge performance, and industrial reliability. Therefore, it is widely used in UAV and drone systems requiring stable energy output under extreme conditions.
Defond further strengthens this product with full-chain R&D capability, ensuring consistent quality from cell to PACK level.
CTA
If you are developing UAV systems or industrial drone projects, contact Defond to request technical data sheets, OEM customization options, or sample testing support.