The Lenovo 170W Slim Tip AC Adapter for ThinkPad E540 (4X20E50574) is a powerful and reliable charging solution for your ThinkPad E540 laptop. With its slim and lightweight design, it is easy to carry and perfect for travel. This adapter features a slim tip connector that is compatible with the ThinkPad E540, ensuring a secure connection. With its 170W power output, it provides fast and efficient charging for your laptop, keeping it powered up and ready to go. Trust in the quality and performance of this Lenovo AC adapter for a hassle-free charging experience.