HP DeskJet 3721 3723 3724 Ink Cartridges
Shop ink cartridges for your HP DeskJet 3721, 3723, and 3724 printers, which use the HP 65 and 65XL ink cartridges series. The DeskJet 3700 range is an ultra-compact all-in-one printer designed primarily for low-volume home document printing and school work. Ink Depot has been supplying reliable consumables for these printers since Mar 2017. Our 4.8 Google rating proves it: we consistently supply premium cartridges backed by rock-solid reliability. Replacing a standard N9K02AA Black or N9K01AA Tri-Colour cartridge with high-yield N9K04AA or N9K03AA XL alternatives significantly reduces how frequently you need to swap cartridges during busy study periods.
Page Output and Cartridge Life Expectations
HP tests standard 65 and high-yield 65XL cartridges according to ISO/IEC 24711 standards for continuous printing. High-yield N9K04AA Black and N9K03AA Tri-Colour cartridges deliver roughly three times the print volume of standard cartridges, making XL packs the most practical choice for routine home and student printing.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| 65 | Standard | Black | 120 | $0.28 |
| 65 | Standard | Colour | 100 | $0.37 |
| 65XL | High Yield | Black | 300 | $0.24 |
| 65XL | High Yield | Colour | 300 | $0.29 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Choosing Between Genuine and Compatible Options
If you are looking to lower your everyday printing costs, compatible HP 65XL cartridges offer a budget-friendly alternative to genuine HP supplies. They contain high-yield capacity ink manufactured to meet everyday printing demands. Under Australian Consumer Law, using compatible cartridges does not void your printer warranty. Every compatible product sold by Ink Depot is backed by our risk-free guarantee. To understand how third-party cartridges compare to original manufacturer products in performance and page yield, read our genuine vs compatible cartridge guide.
How to Select the Right Cartridges for Your Printing
If you print occasional text documents, standard HP 65 cartridges like the N9K02AA Black are sufficient. However, if you print school projects or regular assignments, upgrading to 65XL high-yield cartridges or multi-packs offers substantially better value per page. Our compatible cartridges come with a money-back guarantee if they do not perform to your satisfaction. Free delivery applies on all orders over $99. We dispatch quickly from nationwide warehouses located in Perth, Brisbane, Sydney, Melbourne, and Adelaide. Browse our complete range of HP ink cartridges or check our returns policy for complete peace of mind.
Pro Tip for HP 65 Series Inks
HP 65 series printers use an integrated printhead cartridge system, meaning the printhead is built directly into the N9K01AA, N9K02AA, N9K03AA, and N9K04AA cartridges. Whenever you install a fresh cartridge, you automatically get a brand new printhead, eliminating long-term printhead wear issues.
Frequently Asked Questions
Do the HP DeskJet 3721, 3723, and 3724 all use the exact same ink cartridges?
Yes. The HP DeskJet 3721, 3723, and 3724 are model variations within the DeskJet 3700 series and share identical HP 65 and 65XL cartridge slots. Any standard or XL 65 cartridge listed on this page will fit all three models.
Will HP 65XL high-yield cartridges fit in the same slot as standard HP 65 cartridges?
Yes. HP 65XL cartridges have the exact same physical dimensions as standard HP 65 cartridges. The XL designation refers purely to the higher ink volume inside the cartridge, allowing it to yield up to 300 pages compared to 120 pages for the standard Black cartridge.
Why does my tri-colour HP 65 cartridge indicate low ink even if I only print in one dominant colour?
The HP 65 tri-colour cartridge (N9K01AA / N9K03AA) contains Cyan, Magenta, and Yellow ink in three separate internal chambers. If a project uses significant amounts of one colour, such as Cyan in a sky photo, that specific chamber depletes first. Because the single cartridge feeds all three colours, once one chamber runs empty, the entire cartridge must be replaced to restore complete colour accuracy.
How should I store spare HP 65XL cartridges to prevent ink drying out before use?
Unopened HP 65 and 65XL ink cartridges should be stored upright in their original sealed packaging at room temperature, away from direct sunlight and extreme heat. Sealed cartridges maintain their quality for up to two years from manufacture.
