The Original INR21700 40T 3.6V Lithium-ion Battery is a high-performance rechargeable cell with a 4000mAh capacity and a powerful 45A continuous discharge rate. Designed for Saug devices, laptops, cameras, and tablets, it ensures stable, long-lasting power output. Its cylindrical 21700 design makes it suitable for compact electronics, energy storage, and high-drain devices requiring consistent performance and durability.