......You're in the middle of playing Angry Birds when your iPod goes BEEP BEEP 20% battery left. tu yell in agony going NOOOOOO!!!! Well this is how tu stop it! First , turn off wifi. This is because it takes up signals and uses power. Also close any open apps. To do this, double-click the inicial button and hold an icon. Then press the - on every app. Especially don't let it get too hot because then it will use más power to cool itself off, much like a person. Last, Dim your screen. Go to Settings and tu should find Brightness there. Hope this helps!! To learn more, download an app called Tips & Tricks: iPhone Secrets !!