The OA04 replacement battery is a reliable Li-Ion battery designed for compatible HP laptops. It offers a voltage of 11.55V and a capacity of 41Wh, ensuring long-lasting power and optimal performance for your device. With a 3-cell configuration, this black battery is easy to install and provides a seamless fit. It is backed by a warranty, guaranteeing its durability and functionality. Be sure to verify compatibility with your specific laptop model and part number before purchasing to ensure a perfect match.