Lenovo Depot/Customer Carry-In Upgrade (5WS0A23813)extends a 1-year base depot or carry-in warranty to a total of 3 years of carry-in service, Duration: Total 3 years (from original purchase date of the equipment), Coverage: Hardware repair parts and labor for covered failures, Supported Models: Select ThinkPad and ThinkBook laptops, including ThinkPad E14/E15/E16 series configured with a 1-year base carry-in/depot, Carry-in / Mail-in: You ship or carry the device to an authorized repair depot. Eligibility: Must be purchased while the base 1-year warranty is still active. Activation: Linked via part registration/entitlement on Lenovo's support portal after purchase