This laptop was released in June of 2014. The Lenovo IdeaPad FLEX 4-1580 1 TB HDD (512 GB SSD) of storage, this is the biggest difference between the is model and prievious ones. Some well known failures for this device is entering sleep mode at random times. This laptop can be opened to a full 360 degrees. The Lenovo IdeaPad Flex 4- 1850 can be identified by its model number : MPNXB6B02050.
