Lenovo's flagship ThinkPad X1 Carbon gets a smaller build and longer-lasting battery life - The Verge
IBM Lenovo Thinkpad X1 Carbon Gen 5 2017 and Lenovo Thinkpad X1 Carbon 6th Gen 2018 Type 20KH 20KG laptop Original Keyboard 01ER623 SN20M08031, SN20P38706 - WIT Computers
Lenovo ThinkPad X1 Carbon (2017) review: A modern classic for the battery-bleeding business traveler - CNET
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