https://www.cnet.com/news/intel-teases-28-hour-laptop-battery-life-heres-what-you-need-to-know/

More battery life. We all want it, but batteries aren't improving, at least not quickly enough. So companies have to find battery savings elsewhere. But when it comes to laptops, chipmaker Intel may have just found a veritable jackpot. According to the company, Intel's new Low Power Display Technology will let a standard lightweight laptop run up to 28 hours on a charge.

What's the secret? The screen. Intel says it's using a special LCD panel from Sharp and Innolux that consumes just 1 watt of power. That's half as much as a similar laptop screen would use before.