The Heavy Duty Karma 510 Battery is engineered for durability and performance, offering an enhanced vaping experience with a rugged design. With adjustable voltage, preheat mode, and long-lasting power, this device is perfect for users seeking a robust and reliable solution for their 510-thread cartridges. Features 510 Thread Connection: Universal compatibility with most 510-thread cartridges, making it versatile for various vaping setups. Powerful 650mAh Battery: Provides a solid amount of power for extended sessions, ensuring reliability without frequent recharging. On/Off Function: Activate or deactivate your device with a quick 5 clicks for easy operation and added security. Preheat Mode: Enter preheat mode with 2 clicks to prime your cartridge for smoother hits. The LED light will stay on for 10 seconds, ensuring optimal vapor production. Adjustable Voltage: Easily adjust voltage levels to suit your preference with 3 clicks: Green (2.4V) for a gentle, low-temp experience Blue (3.2V) for a balanced, smooth vapor Red (4.0V) for a stronger, more intense vapor output USB Charging: Convenient USB charging port for easy recharging, ensuring you're always ready to go. Heavy-Duty Design: Built for durability, the Heavy Duty Karma 510 Battery can withstand daily use while maintaining consistent performance.