&quot;Longer battery life&quot; can be restated as: a lower ambient temperature for your room&#x2F;office; less CPU cooler fan noise; a lower power bill; the ability to pack more servers per rack in a co-lo environment (yes, servers run browsers–headless ones, for spidering&#x2F;scraping); etc. It can even be restated in terms of extra performance, when you consider technologies like Intel&#x27;s Turbo Boost.