The following notice has been issued by the manufacturer:
Lenovo ThinkPad X1 Carbon 5th Generation Laptop
Lenovo is voluntarily recalling some ThinkPad X1 Carbon 5th Generation laptops.
Lenovo has determined that a limited number of such laptops may have an unfastened screw that could damage the laptop’s battery causing overheating, potentially posing a fire hazard.
ThinkPad X1 Carbon 5th Generation laptops manufactured on or after 1 November 2017 are not affected.
For more information see https://support.lenovo.com/gb/en/solutions/ht504453