100% Brand NEW,Battery Type: Li-ion Voltage:14.4V Capacity:48WH CELL:4-cell High Quality Battey for lenovo;Gomarty has registered a U.S. Trademark and the serial number is 87155272; Battery Models:L12L4K01 L12S4E21 L12S4K01 L12M4E21 L12M4K01 4INR19/65-1 4INR19/66 This laptop Battery works with Lenovo Erazer Z400A Z500A Series,IdeaPad Z400 Z400A Z410 Z500 Z500A Z510 Series,IdeaPad Z400 Z500 Touch Series,IdeaPad P400 P500 Series,IdeaPad P500 Touch Series