21700A Lithium-Ion Rechargeable Battery – 4.2V 5000mAh High Capacity (Made in Japan)
Power your most demanding devices with the industrial-grade 21700A 5000mAh Lithium-Ion Battery. Specifically designed for high-drain applications, this cell offers a massive energy density that outperforms standard 18650 batteries in both runtime and stability. Whether you are building a custom EV battery pack, upgrading your high-lumen tactical flashlight, or looking for reliable cells for cordless power tools, the 21700A delivers consistent 4.2V peak performance. Built with advanced safety features and a robust cycle life, this Li-ion cell is the gold standard for enthusiasts and professionals who refuse to compromise on power. Don’t just stay connected—stay ahead with long-lasting, reliable energy.
Features
- Massive 5000mAh Capacity: Enjoy significantly longer runtimes compared to standard rechargeable batteries.
- Stable 4.2V Output: Optimized for high-drain devices that require steady voltage under heavy load.
- High-Density Energy: The 21700 form factor provides the best balance of size and power for modern EV and DIY projects.
- Rechargeable & Eco-Friendly: Designed for hundreds of charge cycles, reducing waste and saving you money over time.
- Safety Printed Warnings: Includes clear handling instructions directly on the wrap to ensure user safety.
- Flat Top Design: Ensures a secure fit in high-end battery sleds and custom-welded packs.
Benefits
- Extended Run Time: Ideal for long-distance outdoor activities or professional work shifts.
- Reliable Power: Maintains high performance even in temperature-variable environments.
- Universal Compatibility: Fits the latest generation of premium flashlights and vape devices designed for 21700 cells.
- Cost Efficient: Long cycle life means fewer replacements needed over the years.
Perfect For
- DIY Techies: Building e-bike batteries or portable power stations.
- Flashlight Enthusiasts: Powering 2000+ lumen searchlights.
- Vapers: For devices requiring high-capacity 21700 support.
- Professional Contractors: Keeping high-drain cordless tools running all day.
| Model | 21700A |
|---|---|
| Chemistry | Lithium-Ion (Li-ion) |
| Capacity | 5000mAh |
| Rated Voltage | 4.2V (Fully Charged) / 3.7V (Nominal) |
| Shape | Cylindrical |
| Size | 21mm (Diameter) x 70mm (Length) |
| Protection | Unprotected (Requires a Battery Management System for packs) |
| Application | Flashlights, EV Battery Packs, Power Banks, Power Tools |
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