Express Parts for 18.5V 3.5A 65W HP 550 620 625 LAPTOP CHARGER AC ADAPTER POWER SUPPLY LEAD UK ECP 3rd Party Adapter: Amazon.co.uk: Computers & Accessories
18.5V 3.5A 65W Laptop AC Adapter Charger For Cadernos HP HP550 HP541 HP540 HP530 HP520 HP510 HP500 HP421 HP420 - AliExpress
18.5V 3.5A For HP 550 620 625 510 530 G5000 G6000 Laptop Charger Adapt - ZR Bazzar