Brother HL 1270N - Manual (Page 92)

A-2
Print Media Toner cartridge: 3,000 pages/standard capacity toner
cartridge
6,000 pages/high capacity toner cartridge
Life Expectancy: (When printing A4- or letter-size paper at
5% print coverage.)
NOTE:
Toner life expectancy will vary depending on the type of average print job
printed.
Life Expectancy: Drum unit: Average up to 20,000 pages
NOTE:
There are many factors that determine the actual drum life, such as
temperature, humidity, type of paper and toner that you use, the number of
pages per print job, etc.