BatteryBuy.us is specialized in providing high-quality replacement batteries for varieties of laptops. All ASUS Z batteries that we supply will be tested by technicians to ensure that their designs can meet or even exceed OEM specifications. You can choose the correct ASUS Z battery from the following directory. In addition, we also provide a 30-day refund guarantee and a one-year warranty to ensure your confidence with our ASUS Z batteries. If you have any questions, please feel free to contact our customer service. It is our pleasure to solve problems for you.