HP Deskjet 820cxi Ink Cartridges
Your HP Deskjet 820cxi printer uses the HP 45 ink cartridge series. Ink Depot has been supplying reliable consumables for this printer since Aug 2026. Built primarily for crisp monochrome text documents, this thermal inkjet printer relies on high-density black pigment ink for sharp page output. As demonstrated by our 4.8 Google rating, we are committed to providing premium consumable cartridges.
Expected page output and replacement cycles
Page yields for the HP 45 (51645AA) cartridge are measured in accordance with ISO/IEC 24711 testing standards under standard office printing conditions. Actual print output depends on page coverage, document graphics, 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 HP 45 cartridges
Selecting between genuine and compatible cartridges comes down to operating budget and volume requirements. Compatible cartridges offer high page capacity at a significantly reduced price point without compromising document legibility. Under Australian Consumer Law, using compatible cartridges does not void your printer warranty. To learn more about how third-party options perform against original manufacturer supplies, read our guide on genuine vs compatible cartridges.
Ordering options and fast delivery
For high-volume text printing on the HP Deskjet 820cxi, opting for compatible HP 45 (51645AA) cartridges significantly reduces ongoing expenses. All compatible options come with a money back guarantee if they do not perform as expected, backed by our standard returns policy. Browse our complete range of HP ink cartridges for reliable performance. Free delivery applies on all orders over $99, dispatched quickly from our warehouses in Sydney, Melbourne, Brisbane, Perth, and Adelaide.
Cartridge buyer's tip
The HP 45 (51645AA) black cartridge features an integrated printhead mechanism, meaning a fresh printhead is installed with every replacement to maintain crisp, smudge-free text over long storage periods.
Frequently Asked Questions
Can I use the HP 45 (51645AA) cartridge if my printer has been sitting idle for a while?
Yes. Because the HP 45 (51645AA) cartridge houses the printhead directly within the cartridge assembly, replacing a depleted or dried-out cartridge automatically installs a clean, unused printhead, restoring clear text output immediately.
What is the difference in page yield between genuine and compatible HP 45 (51645AA) cartridges?
Genuine HP 45 (51645AA) cartridges are rated for approximately 883 pages, while compatible HP 45 (51645AA) cartridges yield around 833 pages under ISO/IEC testing conditions, offering comparable volume at a fraction of the cost.
Why does the HP 45 (51645AA) cartridge produce darker text than standard dye-based inks?
The HP 45 (51645AA) uses high-density pigment-based black ink, which rests on top of paper fibers rather than soaking in, resulting in sharper edges and better water resistance for text documents.
