HP Officejet T45 T65 Ink Cartridges
Your HP Officejet T45 and T65 printers use the HP 45 ink cartridge series. The HP Officejet T45 and T65 are classic desktop all-in-one multifunction inkjets designed for monochrome document printing and faxing in home office environments. Ink Depot has been supplying reliable consumables for this printer since Aug 2026. Switching to compatible 45 (51645AA) cartridges significantly lowers printing costs for routine text documents without impacting output clarity. Our 4.8 Google rating reflects a long-standing track record of premium cartridge performance.
Expected page output and replacement cycles
Page yield for HP 45 (51645AA) ink cartridges is measured using ISO/IEC 24711 standard testing guidelines based on 5% coverage on standard A4 paper. Actual output varies depending on page coverage, document density, and print frequency.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| 45 | Standard | Black | 883 | $0.15 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Choosing between genuine and compatible options
Both genuine HP and compatible 45 (51645AA) black cartridges fit directly into the printer carriage without modifications. Compatible options deliver dependable everyday text printing at a significantly lower purchase price. Compare genuine vs compatible cartridges in our detailed guide. Under Australian Consumer Law, using compatible cartridges does not void your printer warranty.
How most users manage replacements
For high-volume text printing, compatible 45 (51645AA) cartridges offer the best balance of output and economy, backed by our 100% money-back guarantee outlined in our returns policy. We ship directly from warehouses in Perth, Brisbane, Sydney, Melbourne and Adelaide to ensure prompt delivery across Australia. Free delivery applies on all orders over $99. Explore our complete selection of HP ink cartridges for all your printing needs.
Pro Tip
The HP 45 (51645AA) cartridge design includes an integrated printhead, meaning each cartridge replacement automatically installs a fresh printhead to maintain clean text edges on everyday documents.
Frequently Asked Questions
Do the HP Officejet T45 and T65 use the exact same ink cartridges?
Yes. Both the HP Officejet T45 and T65 belong to the same hardware family and share the identical HP 45 (51645AA) black ink cartridge slot, so cartridges fit both models interchangeably.
Is the printhead integrated directly into the HP 45 (51645AA) cartridge?
Yes, the HP 45 (51645AA) ink cartridge features an integrated printhead mechanism. Replacing the cartridge installs a new firing nozzle grid, which helps eliminate clogging issues associated with aging printheads.
Can I leave an HP 45 cartridge installed if I only print occasionally?
While HP 45 cartridges are robust, infrequent printing can cause ink in the nozzles to dry out over time. Printing a brief test page every week or two keeps ink flowing smoothly through the integrated printhead.
Are compatible 45 (51645AA) cartridges physically identical to genuine HP cartridges?
Compatible 45 cartridges match the exact outer casing dimensions and contact alignments of original HP 51645AA cartridges, allowing them to snap directly into the carriage assembly without force.
