Reman.
96 (C8767WN) Black Cartridge compatible with:
DeskJet 5740, 5740xi, 6520, 6520xi, 6540, 6540dt, 6540xi, 6840, 6840dt, 6840xi, 9800
Photosmart 2610, 2610v, 2610xi, 2710, 2710xi, 8150, 8150xi, 8450, 8450xi, PSC 16
The use of compatible supplies does not void your printer warranty.