When high-performance, quality, and longevity are your battery upgrade criteria, NuPower is your answer. NuPower batteries are designed to meet and exceed factory specifications, so now you can listen to more music, watch more videos, and get more work done between recharges. To ensure your confidence and satisfaction, these highest-quality batteries are backed by free, award-winning US-based support and a one-year, 48-hour or less turnaround warranty.