HP Deskjet 840c 841c 842c 843c 845c Ink Cartridges
Your HP Deskjet 840c, 841c, 842c, 843c, and 845c printers use 15 (C6615DA) black ink cartridges. These compact home inkjet printers were engineered for everyday document printing using thermal inkjet technology. Ink Depot has been supplying reliable consumables for this printer range since Aug 2026. Our 4.8 Google rating reflects a long-standing track record of premium cartridge performance. Using compatible 15 (C6615DA) black cartridges ensures sharp black text for general household printing.
Expected Page Output and Replacement Cycles
Page yields for HP inkjet cartridges are measured according to ISO/IEC 24711 testing standards under continuous printing conditions. Actual output varies depending on page coverage, document density, and printing frequency during everyday home use.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| 15 | Standard | Black | 495 | $0.056 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Compatible cartridges.
Choosing Compatible Cartridges for Your Deskjet
Choosing compatible 15 (C6615DA) cartridges is a budget-friendly way to keep older HP Deskjet models operational. Under Australian Consumer Law, using compatible cartridges does not void your printer warranty. To understand how third-party alternatives match original manufacturer specifications, read our guide on genuine vs compatible cartridges.
Managing Your Replacement Cartridges
If you print mainly text documents, keeping spare 15 (C6615DA) black cartridges on hand prevents unexpected downtime. All our compatible cartridges are backed by a money-back guarantee if they do not perform as expected; see our returns policy for full details. We ship directly from warehouses in Perth, Brisbane, Sydney, Melbourne and Adelaide. Free delivery applies on all orders over $99. Explore our complete selection of HP ink cartridges for all your home printing requirements.
Smart Cartridge Buying Tip
Because older inkjet cartridges integrate the printhead onto the cartridge unit itself, replacing your 15 (C6615DA) cartridge essentially replaces the printing mechanism, restoring clear text output instantly if print quality ever degrades.
Frequently Asked Questions
Do the HP Deskjet 840c, 841c, 842c, 843c, and 845c all use the same black cartridge?
Yes, all printers in this Deskjet range share the same 15 (C6615DA) black ink cartridge, making them fully interchangeable across every listed model.
What should I do if my Deskjet printer sits idle for long periods between print jobs?
To prevent ink from drying inside the integrated printhead of the 15 (C6615DA) cartridge, leave the printer powered on standby so it can run automated nozzle protection routines, or print a single text page every few weeks.
How should spare 15 (C6615DA) cartridges be stored before use?
Keep sealed cartridges in their protective packaging at room temperature, away from direct sunlight and extreme temperatures, to preserve ink viscosity and internal pressure until installation.
Will compatible 15 (C6615DA) cartridges work seamlessly in older Deskjet printers?
Yes, compatible cartridges are manufactured to match original physical dimensions and contact chip configurations, ensuring immediate recognition and consistent performance across the Deskjet 800 series.
