I have had an HP1606dn copier for a few years. At first I bought generic branded cartridges but then switched to HP 78A toner cartridges. Compared to original HP 78A cartridges, normal branded cartridges seemed to run out much faster. I suspect generic cartridge manufacturers refill them with less toner powder. Generic manufacturers are worth their money in my opinion. The lower price leads to less good specimens.
Brother TN436BK Super High Yield Toner, Black - Retail Packaging
11 Review
HP 902XL Magenta Ink Cartridge for 🖨️ HP OfficeJet 6900 & Pro 6900 Series, T6M06AN
11 Review
HP 62XL Tri-color High-yield Ink, Compatible with HP ENVY 5540, 5640, 5660, 7640 Series, HP OfficeJet 5740, 8040 Series, HP OfficeJet Mobile 200, 250 Series, Instant Ink Eligible, C2P07AN
12 Review
Inkjet MFP HP Ink Tank Wireless 419, color, A4, black
52 Review