Brother IntelliFax-2820 - Manual (Page 149)

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Consumable items
Note
Toner life expectancy will vary depending upon the type of average print job.
Note
There are many factors that determine the actual drum life, such as temperature, humidity, type
of paper, toner you use and number of pages per print job.
Toner Cartridge Life (TN-350) Starter Toner Cartridge: Approx 1,500 pages*
Standard Toner Cartridge: Approx 2,500 pages* +
* When printing letter or A4 size paper at 5% print coverage
+ Require additional purchase
Drum Unit Life Expectancy
(DR-350) Approx 12,000 pages