Ooops, you forgot to charge your iPod and you noticed that your MP3 player's battery is running low, there's nowhere else to charge the battery but home. To keep the music playing until you reach home, don't use those "back" and "next" buttons. Searching through songs from ipods low on batteries require them to access its hard drive more frequently, eating up a lot of power, which drains the battery. Use the shuffle feature instead ir create your own playlist and stick with it. The trick will double the tune-playing time.