Top quality replacement battery for laptops and notebooks, made from high grade samsung original cells. Features: - 100% compatible with specified laptop brand & size - Made from high quality materials - Samsung original cells for long life cycle - True output gives correct voltage required Specifications: - Item No: HP 500 - Chemistry: Li-ion Compatible Models: HP 500 / 520 SERIES Compatible Part No: 434045-141 , 434045-621 , 434045-661 , 438134-001 , 438518-001 , HSTNN-FB39 , HSTNN-IB39