Our Laptop Battery for Samsung R428 R580 AA-PB9NS6B Lithium Battery is manufactured in our factory with high-quality materials to ensure durability and long-lasting performance. It is compatible with Samsung R428 and R580 models and has a capacity of 4400mAh. This battery is designed to meet or exceed OEM specifications and comes with a 12 months warranty. With our factory direct pricing, you can enjoy great savings without compromising on quality. Purchase this battery today and experience uninterrupted computing on your Samsung laptop.