Samsung ML-2955ND-XAA - Manual (Page 191)

Storing the toner cartridge
101 5. Maintenance
Samsung’s printer warranty does not cover damage to the
machine caused by the use of a refilled, remanufactured, or
non-Samsung brand toner cartridges.
3
Estimated cartridge life
Estimated cartridge life the life of the toner cartridge (or imaging
unit) yield depends on the amount of toner that print jobs require.
The actual print yield may vary depending on the print density of the
pages you print on, operating environment, percentage of image
area, printing interval, media type and/or media size. For example, if
you print a lot of graphics, the consumption of the toner is higher
and you may need to change the cartridge more often.