Filed as a schematic, the 294 KB PDF is named 45CKQ100 and gives no laptop model or board information. The code follows the style of a discrete semiconductor part number, so the file most likely holds a datasheet with ratings, curves and a package outline; its size suggests fairly detailed content. Technicians refer to it to confirm terminal arrangement and limits when replacing a failed part. Compare the full marking on the component with this code before ordering a substitute.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.