The Penergy Laptop Charger is designed for various Lenovo Ideapad, G-series, and Y-series models, providing a power output of 65W with a voltage of 20V and a current of 3.25A. It features a 5.5 x 2.5mm pin, ensuring compatibility with the specified laptop models. When purchasing, ensure that the charger meets your laptop's requirements in terms of voltage and amperage. It's also a good idea to check customer reviews for reliability and performance. If you have specific questions about usage or compatibility, feel free to ask!