Lenovo Z500 / Z510 / Z400 Battery (L12M4E01 / L12S4E01 / L12S4A02 OEM Replacement)

This battery is designed for Lenovo IdeaPad Z400, Z500, and Z510 series laptops. It is a 4-cell internal lithium-ion battery used in multimedia laptops, providing stable power for everyday use such as browsing, office work, and media playback. The most common part numbers are L12M4E01, L12S4E01, L12S4A02, L12M4F02, and L12S4K01, which are interchangeable depending on model variant and production batch.