Get a high-quality replacement battery for your Dell Inspiron 15 and Latitude E5420/E5520 laptops with the 8858X T54FJ KJ321 Battery. This 6-cell Li-Ion battery has a battery capacity of 5200mAh and a voltage of 11.1V, providing a reliable power source for your device. This black battery is compatible with several Dell laptop models, including Inspiron 14R 5420, 15R 5520/7520/7720, and Latitude E6120/E6420/E6520. It comes with a 2-year manufacturer warranty, giving you peace of mind in case of any issues. Upgrade your laptop's battery life with this efficient and durable replacement battery.