The ROI for battery life falls off at a certain point, right? For phones, it's probably about a day -- how often is it a problem to plug in your phone at som

The ROI for battery life falls off at a certain point, right? For phones, it's probably about a day -- how often is it a problem to plug in your phone at some point in a 24-hour period? -- and for laptops it's often about a full workday, 8-10 hours. I'm not saying that a 20-hour laptop battery isn't an incredible accomplishment, but I do think that I care a lot less about 20 vs 10 hours than I do about 10 vs 5.