Qualcomm's Quick Charge 4.0 is a fast charging technology designed to significantly reduce the time it takes to charge compatible devices. It can deliver up to 20% faster charging compared to its predecessor, Quick Charge 3.0, and is capable of charging a device to 50% in just 15 minutes. This technology is compatible with a wide range of devices, including smartphones and tablets. One of the key features of Quick Charge 4.0 is its support for USB Power Delivery, which allows for more efficient power management. Additionally, it includes safety features like Temperature Management and Overvoltage Protection to ensure devices charge safely and effectively.