Specification: Battery type:Li-ion Voltage:15.36V Capacity: 45Wh Cells4 cell. Recharge cycles:500; The battery is durable and has overcurrent protection, anti-overcharge, anti-overdischarge and temperature control functions. Replace Part Number: L18C4PF3 L18M4PF3 L18M4PF4 L18C4PF4 5B10T09077 5B10T09080 5B10W67417 5B10W67415 5B10W67221 5B10T09081 5B10T09079 5B10W67194. Compatible Models: for Lenovo IdeaPad C340-14API C340-14IML C340-14IWL Series, IdeaPad S540-14API S540-14IML S540-14IML Touch S540-14IWL S540-14IWL Touch Series, IdeaPad Flex-14IML Flex-14IWL Series, IdeaPad Flex-14API Type 81SS - Model 81SS0005US Series. Security & Reliability: Our batteries are assembled from top quality material and circuit boards to ensure fast charges and low power consumption, 100% New from Manufacturer, Overcharge and Overdischarge Circuit Protection, Over-temperature and Short-circuit Protection, up to 500 recharge cycles over the life of the battery, meet OEM standard.