Noun
English Wikipedia has an article on:watt-hourWikipedia
watt-hour (plural watt-hours)
A unit of electrical energy equal to the power of one watt in use for one hour; often used as a unit of electricity consumption. Equal to 3600 joule.
watt hour
Lenovo’s replaced the Yoga 900’s 66 watt-hour model with a 78WHr unit in the 910. The company says this upgrade increases the battery life during local video playback in the 910 by one hour—while the Yoga 900 claimed eight hours, the 910 claims nine. Source: Internet
The only other comparable laptop here is the older MSI GS63VR, which also has a 4K panel, plus a slightly undersized 65 watt-hour battery. Source: Internet