HP's latest Spectre x360 laptops boast up to a 22-hour battery
 

HP is once again tweaking its Spectre x360 convertible laptops, but this time the changes promise to be more tangible. The new Spectre x360 13 and 15 boast common functional upgrades, such as a dual-chamfered design (it's now easier to lift the lid)...

https://www.engadget.com/2018/10/23/...tre-x360-2018/