Lightweight and portable Thanks to the carbon fiber shell design, it weighs only 88g, making it incredibly lightweight and easy to carry around. Large Battery Capacity The carbon Battery 6K, which packs a 6,000mAh large Li-ion battery with an energy density of 245.Wh/kg, has the highest energy density among its competitors, offering a longer power supply. Tri-proof Design for Enhanced Durability 2m submersible and waterproof: Offers outstanding water and dust resistance, ensuring steady power supply in various environments. Impact Resistant: The carbon fiber shell has high mechanical strength and thus provides good protection for the battery. Wall-balanced Design Connecting the Carbon Battery 6K to the headlamp keeps a balanced weight distribution for a stable and comfortable fit. Innovative Quick Release Construction For easy battery removal and replacement ensuring the headlamp is always powered up. Performance Mode When the Carbon Battery 6K connects to NITECORE headlamps, the headlamp will seamlessly activate the Performance Mode. This mode is purposefully designed to regulate the rate of brightness reduction in the headlamp. Ensuing a more stable output over time. Specifications: Battery Type: Li-ion Battery Capacity: 6,000mAh 3.6V (21.6Wh) Rated Energy: 3,700mAh 5V (TYP 1A) Input: USB-C: 5V-2A Output: USB-C: 5V-2A IP Rating: IP68 Weight: 88g