PDF document covering the Intersil ISL6259 battery charger controller, labelled as charging IC material. Expect pinout, typical application circuit and functional description rather than a full laptop schematic. Technicians consult it when a notebook does not charge or fails to pass adapter power, checking input detection, gate drive to the power MOSFETs, current sense resistors and the SMBus interface. Compare the package and marking on the board with the document before trusting pin numbers, as variants can differ.
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 @lappysan. 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.