Technical Specifications: Input Voltage: 100–240V, 50–60Hz (supports international voltage standards) Output Voltage: 20V Output Current: 3.25A Power Rating: 65W Connector Type: Big Yellow Pin (round-tip) Compatibility: Designed for a wide range of Lenovo laptop models, including ThinkPad and IdeaPad series that use the big yellow pin connector. Safety Features: Built-in over-voltage, short-circuit, and over-current protection for worry-free charging.