BTI has become one of the leading manufacturers of batteries & accessories for notebook computers. It offers products for many manufacturers notebook computers & cellular phones. By maintaining strict quality standards in production, as well as in sourcing, BTI is able to provide consistent, high-capacity & durable batteries. This product is designed for HP Pavilion DV1000, DV4000, ZE2000 Series. Features Power Type: Li Ion Power: 11.1V, 4500m Ah Compatibility: Pavilion DV1000; Pavilion DV4000; Pavilion ZE2000; Pavilion ZT4000 OEM P/N: PF723A, 367759-001; 396600-001