When high-performance, quality and longevity are your battery upgrade criteria, Newertech NuPower is your answer. NuPower batteries are designed to meet and exceed factory specifications. With renewed battery life you can listen to more music, watch more videos and get more work done between recharges. To ensure your confidence and satisfaction, these high-quality batteries are backed by a one-year warranty. NuPower batteries are engineered to perfectly complement the fit and finish of your Mac® notebook. They also offer full compatibility with applicable OEM sleep and power reduction modes. Each new battery includes an informative battery recycling page that details the options you have for the disposal of your old battery. NuPower battery upgrade solutions are environmentally responsible and feature RoHS certification that they are free of lead, mercury and cadmium, PBBs and PBDE.