hp adapter 19.5V 2.31A 45W 4.5*3.0 blue pin For HP EliteBook 810 820 840 HP 250 / 255 G3 HP Spectre 13 Pro / x2 Pro P/N:696694-001, HSTNN-LA35, 696607-001, 721092-001, H6Y88AA 45W HP PSU