This fast charging case is designed specifically for the Insta360 X4 Air battery, providing an efficient, safe, and intelligent charging experience. It utilizes 36W PD fast charging technology, supporting simultaneous charging of two batteries for significantly improved charging efficiency. The charging case features an intuitive display screen that shows real-time input/output power, battery level, health status, and cycle count, allowing you to monitor your battery status at any time. Multiple built-in circuit protection mechanisms, including overvoltage, overcurrent, overtemperature, and short-circuit protection, ensure safe use. Its compact and lightweight design includes a built-in Type-C charging cable, compatible with most PD chargers and power banks, making it plug-and-play and ideal for outdoor shooting and travel. The intelligent charging system activates high-speed charging when the battery is low and automatically switches to trickle charging mode when the battery level is above 80%, effectively protecting battery life. For optimal charging results, it is recommended to use a 12V/2.8A or higher PD adapter. This product is tailor-made for the Insta360 X4 Air battery, making it an efficient charging companion for photographers and video creators.