What is the model number of the BTI AC adapter?

The model number of the BTI AC adapter is 671R3UT#ABA-BTI.

Is the BTI 671R3UT#ABA-BTI AC adapter compatible with multiple models of laptops?

Yes, the BTI 671R3UT#ABA-BTI AC adapter is compatible with several models including the EliteBook 1040 14IN G10, G11, G9, and the 830 and 835 series.

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BTI 671R3UT#ABA-BTI 65W Type-C AC Adapter For EliteBook 1040 14" G10, 1040 14"