One-on-One 24 hours customer service,30 days money back or exchange, free 12 months warranty. If you have any questions and help, welcome contact us by email. Passed CE/ROHS/FCC/CCC Certification. our products are following top industry standards, and include numerous safety mechanisms, including protection against short circuiting, overvoltage, overcurrent, and internal overheating. Compatible with HP ZBook 15 G3 G4 G5 G6,HP ZBook Studio G3 G4 G5 G6 G7 G8,HP ZBook 15u G3 G4,OMEN by HP Laptop 15, OMEN by HP Laptop 17, Pavilion Gaming 15 17, HP Pavilion 15-bc251nr 15-bc220nr, HP Omen 15 15-ax243dx 15-ax256nr 15-ax043dx 15-ce198wm 15-ce001la 15-ce199nr 15-ce019dx 15-ce003la 15-dc0010nr 15-dc0045nr 15-dc0051nr 15-dc0020nr 15-dc0052nr 15-dc0087nr. Compatible with HP part number: 917649-850, 917677-003, 776620-001, 775626-003, 645509-002, 646212-001, ADP-150XB B, A150A05AL, HSTNN-CA27, TPN-DA03, TPN-DA09, W2F74AA, W2F74UT#ABA, Z5U90AV, 3MD65AV, Y1F28AV. AC input voltage : 100 ~ 240V 50 ~ 60 Hz ,DC output : 19.5V ~ 7.7A 150W, CONNECTOR SIZE: 4.5mm x 3.0mm.