HP Printer cartridges 15 and 45

[ellis.b7]

What is the difference between HP cartridges black 15 and black 45?
They are physically the same(externally).
Thanks.

[Steve R Jones]

hp 15 inkjet print cartridges
• volume: 25 ml
• approximate yield: 603 pages (black)


compatible with:
HP Deskjet 810, 812, 825, 840, 842, 843, 845, 920, 940, 950 printers, HP Officejet K60 and HP Printer*Scanner*Copier 500/750


hp 45 inkjet print cartridges
• volume: 42 ml
• approximate yield: 833 pages (black)


compatible with:
HP DeskJet 700 Series, 820C, 830C, 832C, 850C, 855C, 880C, 882C, 890C, 895C Series, 870C Professional Series, 930C, 932C, 935C, 950C, 952C, 955C, 960C, 970, 995 Series, 990C Professional Series, 1000C, 1120C, 1220C, 1600C, 6122 & 6127 Series printers, HP Color Copiers, HP Officejet G55/85/95, K60/80, R40/60/80, T45/65, HP Officejet Pro 1170, 1175 Series, Fax 1220, HP Photosmart P1000, P1100, P1115, P1215, P1218, P1315 and HP Designjet 700, 750C, 750C Plus, 755CM printers

[ellis.b7]

Thanks. But they both look identical externally and they fit both my hp G85 and my hp 3820 printers.
Are they different in any way? Is one chipped and one not?

[ellis.b7]

I am told by HP that they are interchangeable.