The article provides an in-depth overview of USB Power Delivery (PD) and the latest PD 3.1 standard. USB PD enables faster and more efficient device charging, and PD 3.1 expands power delivery up to 240 watts, supporting high-power devices like gaming laptops, large monitors, and e-scooters. Key features include adjustable voltage, bidirectional power, and backward compatibility with older cables. PD 3.1 simplifies charging, reduces the need for multiple chargers, and improves efficiency for high-capacity devices. Its adoption is driving market growth and moving the industry toward a universal, streamlined charging standard.