HB Plus L18C4PF3 L18C4PF4 Laptop Battery Compatible for Lenovo ideapad C340-14API C340-14IML C340-14IWL S540-14API S540-14IML S540-14IWL Flex-14IML Flex-14IWL Series L18M4PF3 L18M4PF4 Laptop Battery