HP Spectre x360 has the battery backup of Up to 7 hours and 28 minutes.
It is powered by 1.8GHz Intel Core i7-8550U processor with storage OF 256GB SSD and 8GB DDR3.
HP Spectre x360 comes with a 13.3-inch FHD display with a resolution of 1920 X 1080 pixels.
Here are many steps to resolve your issue. If you are facing HP Spectre x360 Black Screen on startup issue then here is the fix to your HP Spectre x360 screen goes black but still running problem.