The OEM NP03XL 11.4V 43WH battery is designed specifically for use with HP Envy X360 laptops, including models such as 15-U, 13-A, and 13-B. With a 43 Wh battery capacity and 3 lithium-ion battery cells, this black battery provides reliable power for your device. It comes with a 1-year manufacturer warranty and is compatible with various HP Pavilion X360 models. This high-quality battery is a reliable and efficient replacement for your old or worn-out laptop battery, ensuring extended usage and performance for your HP Envy X360 laptop.