The Brtong Professional Laptop Battery BRT-LK03XL is a high-quality Li-Ion battery designed for laptops. With a voltage of 11.55 and a capacity of 3 battery cells, this black battery is compatible with regulatory model# HSTNN-IB8M laptops. Manufactured by BRTONG and backed by a 1-year warranty, this professional laptop battery is a reliable and efficient power source for your device. Made in China, this unit is a single battery pack that measures 7" in length and 3.5" in width, providing long-lasting power for your laptop.