Hp 65W Blue pin 3.0mm-Pavilion\Envy\ProBook\EliteBook

The 4.5mm x 3.0mm 65W with a central pin is the key physical characteristic. This pin often has a blue plastic insert or a blue ring around the tip.
HP Pavilion Series: Pavilion 14, 15, 17 (various sub-models, particularly 14-x, 15-x, 17-x series, Pavilion x360 models (some versions).
HP Envy Series: Envy 14, 15, 17 (various sub-models, particularly 14-k, 15-k, 17-j series), Envy Rove 20 (All-in-One PC).
HP Stream Series: HP Stream 11, 13, 14 (various models, including x360).HP Spectre Series.
HP Chromebook Series: 11 G3, 11 G4, 14 G3.
HP ProBook Series: 430 G3, G4, G5; 440 G3, G4, G5; 450 G3, G4, G5; 455 G3, G4, G5; 470 G3, G4, G5. Some ProBook 640 G2, G3, G4, G5; 650 G2, G3, G4, G5.
HP EliteBook Series: EliteBook Folio 1040 G1, G2 (some configurations).
EliteBook 820 G1, G2; 840 G1, G2; 850 G1, G2.
HP 200 Series Notebook PCs: HP 240 G2, 242 G1, 245 G2, 250 G2, 255 G2 (and later generations like G4, G5, G7).HP 340S, 348 G7.