The Yocan Mini Flat is a compact 510-thread battery designed for oil cartridges, featuring: Battery Capacity: 400mAh, providing ample power for extended vaping sessions. Voltage Settings: Offers three adjustable voltage settings (2.6V, 3.2V, 3.8V) for customizable vapor production. Design: Square-shaped construction prevents rolling and adds a modern touch, making it easy to carry. Charging: USB Type-C charging for fast and efficient recharging. Preheat Function: Includes a 10-second preheating feature to ensure smooth vaporization.