The NinjaBatt SH03XL 859356-855 Laptop Battery is designed specifically for the HP Spectre X360, providing a high voltage of 11.55V and a large battery capacity of 57.9WH. Made with Li-Ion technology and featuring 3 battery cells, this black battery is compatible with the specified HP product line. As a reliable and powerful accessory, the NinjaBatt laptop battery ensures longer runtime and performance for your device, making it a practical choice for users needing extended use on the go.