Brother MFC-L8970CDW Toner Cartridges
Shop toner cartridges for your Brother MFC-L8970CDW, which uses the Brother TN645, TN645XL, TN645XXL toner cartridges series along with DR-645CL drum units. The Brother MFC-L8970CDW is a high-speed colour laser multifunction printer designed for demanding office workgroups. Ink Depot has supplied consumables for this printer since Aug 2026. Our 4.8 Google rating proves it: we consistently supply premium cartridges backed by rock-solid reliability. Upgrading to TN645XXLBK cartridges significantly lowers page costs during high-volume document runs.
Expected page output and replacement cycles
Page yields for TN645 series toners are determined under ISO/IEC 19798 standards for colour laser cartridges. High-volume office environments benefit from TN645XXL toners, delivering up to 7,500 pages in black and 6,500 pages per colour cartridge to maintain uninterrupted document workflows.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| TN645BK | Standard | Black | 3,000 | $0.060 |
| TN645C | Standard | Cyan | 1,800 | $0.10 |
| TN645M | Standard | Magenta | 1,800 | $0.10 |
| TN645Y | Standard | Yellow | 1,800 | $0.10 |
| TN645XLBK | High Yield | Black | 5,500 | $0.042 |
| TN645XLC | High Yield | Cyan | 4,500 | $0.075 |
| TN645XLM | High Yield | Magenta | 4,500 | $0.075 |
| TN645XLY | High Yield | Yellow | 4,500 | $0.075 |
| TN645XXLBK | Extra High Yield | Black | 7,500 | $0.033 |
| TN645XXLC | Extra High Yield | Cyan | 6,500 | $0.069 |
| TN645XXLM | Extra High Yield | Magenta | 6,500 | $0.069 |
| TN645XXLY | Extra High Yield | Yellow | 6,500 | $0.069 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Maintaining imaging components
The DR-645CL drum unit is responsible for transferring toner onto paper and operates on a separate duty cycle from individual toner cartridges. While toner cartridges require replacement as ink depletes, the drum unit maintains a long service life of approximately 30,000 pages.
Experience Tip: Remember to manually reset the drum counter through the printer touchscreen panel whenever you install a new DR-645CL drum unit to ensure accurate lifespan tracking.
Choosing the right cartridge setup
For routine administrative work, choosing TN645XXLBK high-capacity black cartridges alongside TN645XL colour variants balances your printing budget and cartridge longevity. Purchasing multi-packs like the TN645XL set helps avoid unexpected downtime across colour channels. Order genuine Brother toner cartridges directly from our warehouses located in Perth, Brisbane, Sydney, Melbourne, and Adelaide. Free delivery applies on all orders over $99. All purchases are backed by our transparent Returns policy.
Pro Tip
Always replace toner cartridges when prompted while leaving the existing DR-645CL drum unit in place; the drum unit lasts through several toner cycles and should only be replaced when separate drum wear warnings appear.
Frequently Asked Questions
Do I need to replace the DR-645CL drum unit every time I change a TN645 toner cartridge?
No, the DR-645CL drum unit operates independently from the toner cartridges and has a rating of 30,000 pages, meaning it will typically outlast four to ten toner replacements depending on whether you use standard or super high-yield capacity cartridges.
Can I mix standard TN645 and super high-yield TN645XXL cartridges in the same printer?
Yes, you can freely mix standard TN645, high-yield TN645XL, and super high-yield TN645XXL cartridges across different colour slots. The printer accepts any yield variant within the series for Black, Cyan, Magenta, or Yellow.
How does print coverage affect page yields on the TN645 series?
Official yields are measured at 5% page coverage under ISO/IEC 19798 standards. If your office regularly prints dense graphics, full-page colour diagrams, or heavy text documents, your actual page yield per cartridge will be lower than the standard rating.
