Laptops powered by Qualcomm Snapdragon processors are clocking in at about 20 hours of battery life. Ditto for notebooks powered by Intel’s “Lunar Lake” chip. But isn’t that number way, way more than what the average user actually needs? No. On the contrary, it’s probably one of the most significant advancements in laptop technology in years, and one that will likely save you money by extending the lifespan of your laptop well beyond what it was a few years ago — as well as just letting you work where you want. Generally speaking, people buy new laptops for several reasons. They fall out of su…