T644DTN
Lexmark's answer to departments that print constantly, the T644DTN combined top-tier speed with duplex printing and dual paper trays. Tray swaps become rare even on heavy days, and duplex printing halves the paper bill automatically. The 640H high-yield cartridge matches the machine's appetite for volume with fewer changes per year. Compatible 640H toner is how you feed this heavyweight without heavyweight bills.
| Cartridge | Color | Page yield |
|---|---|---|
| 640H (64015HA / 64035HA) | Black | ~21,000 pages |
Frequently asked questions
Which toner does the Lexmark T644DTN use?
The Lexmark T644DTN uses the Lexmark 640H high-yield black toner cartridge (OEM 64015HA or 64035HA).
How many pages will one 640H cartridge print in the T644DTN?
About 21,000 pages at 5% coverage (ISO/IEC 19752).
Will a compatible 640H cartridge damage my T644DTN or void its warranty?
No. Compatible cartridges are built to OEM specifications and do not void your printer’s warranty.
Is there a lower-yield 640 cartridge for light use in the T644DTN?
Yes — the 64015SA and 64035SA standard cartridges print about 6,000 pages, a good fit for lighter printing on the T644DTN.