Crusher Tech: What is it? Use the sensory bass slider to enhance your bass, or go all skull crushing! Crusher Tech improves the sound quality of your computer, iPhone, or Android device. Listen to songs the way they were intended to be heard—feel the bass tuned to you. The Crusher Evo's Personal Sound feature analyzes your hearing and creates music just for you. One Fat Battery: You can listen for 40 hours on a single charge, so you'll know you have some juice left over whether you're gaming all day or simply don't have time to charge. A quick 10-minute charge will allow you to play for four hours. Thanks to built-in tile technology, you won't ever lose your headphones again.