Give your iPod a battery boost. Three thousand, nine hundred and eighty. That’s the number of times we played Guided by Voices’ 1-minute song “The Perfect Life” consecutively on a fully charged 7-month-old 80GB 5G iPod at its default settings with a NuPower Video+ iPod battery pack attached. (The song is actually 59 seconds, so we added 1 second of silence to make it a little easier to calculate the NuPower’s, uh, power.) That many minutes add up to 66.33 hours—compared to the 19 hours you can get from just your iPod’s battery. Using it for video playback, we got 22.17 consecutive hours. We also tested it while playing music on shuffle, and got similar results. Oddly, Newer Technology claims you’ll get 80 hours of audio (which we fell short on) and only 16 hours of video. Regardless, that’s a whole lot of iPod-ing going on.