21700A Lithium-Ion Rechargeable Battery – 4.2V 5000mAh

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.

Specifications

• 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

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.