The Klarus 21700 5000mAh Power Lithium Battery is designed to deliver exceptional performance and reliability. With a high capacity of 5000mAh, this lithium-ion battery ensures extended runtime for your devices, making it perfect for high-drain equipment like tactical flashlights, cameras, and other electronic gadgets. The Klarus 21700 battery is built with advanced safety features, including overcharge and discharge protection, short circuit protection, and temperature regulation, ensuring maximum safety during use.