This high-quality battery is designed for use with Dell Latitude 15 5521, Precision 3561, and Alienware m17 R5 laptops. It is a genuine product manufactured by Dell, ensuring compatibility and reliability. This LI-ON battery will provide you with the power you need to keep your laptop running for hours on end without worrying about your device running out of juice. The battery is perfect for those who need to work on their laptops while on the go or away from an outlet. Its lightweight and compact design make it easy to carry with you wherever you go. With this battery, you can enjoy uninterrupted productivity and entertainment without any worries. Order now and enjoy the convenience of a long-lasting battery!