Update: there's been some debate about the battery life on the One, and a few people wondered if I'd gotten a bad unit. HTC shipped me a second, and I re-ran a lot of tests to see if anything was different. First, I ran the Verge Battery Test, our standard test that cycles through a series of popular websites and high-res images with brightness set to 65 percent. The One lasted 4 hours, 48 minutes, a decidedly average score — it's slightly better than poor performers like the Droid DNA (4 hours, 25 minutes), but a long way from our battery life favorites, the Droid RAZR HD (9 hours, 35 minutes) and the RAZR Maxx HD (12 hours, 43 minutes). Streaming the 103-minute Ferris Bueller's Day Off over Wi-Fi from Netflix also burned 58 percent of the device's battery. If you're using it normally (which means relatively lightly), it should last you a whole day, but the One is a decidedly average performer when it comes to battery life.