We are proud to introduce our high-quality Laptop Battery for Samsung R428 R580 AA-PB9NS6B Lithium Battery. At our factory, we use only the best materials and follow rigorous quality control procedures to ensure that our batteries meet or exceed OEM specifications. This replacement battery is designed to provide long-lasting and reliable performance, with a capacity of 4400mAh and a voltage of 11.1V. It is compatible with a number of Samsung laptop models and is easy to install, making it the perfect solution for anyone looking to replace an old or worn-out battery. Buy with confidence knowing that you are getting a factory-made product that is backed by our reliable customer service.