This is a Genuine Samsung AB463446BA 3.7V Li-Ion Cell Phone Battery with a capacity of 800mAh. It is compatible with various Samsung cell phone models such as R250, T255g, and T259. This internal battery is designed to provide long-lasting power for your cell phone, ensuring that you can stay connected for longer periods of time. The battery is made with high-quality materials to ensure reliability and durability. It is also easy to install, making it a convenient replacement for your old or damaged battery. With this Genuine Samsung battery, you can enjoy the peace of mind that comes with knowing that your cell phone is always fully charged and ready to go.