This laptop battery is a perfect replacement for your Dell Latitude E6420, E6440, and E6520. With a capacity of 5200 mAh and 6 battery cells, it can power your laptop for a long time without needing a recharge. The black color and li-ion type make it a sleek and reliable choice for your device.

The package dimensions are 9.69x3.62x1.93 inches, making it easy to store and transport. The NATNO brand and unit quantity of 1 ensure that you are getting a high-quality product. This battery is compatible with Dell Inspiron 17 3721 and has a voltage of 11.1 V. Get the most out of your laptop without worrying about running out of power with this laptop battery.