7525 series black toner going to 1% inaccurately and early

[Eric M]

My 7525 type printers have had their toner dropping to 1% (always 1% and 268 pages remaining) very often, possibly every time though I can't confirm.  The toner is clearly not empty, and usually will last for a while at 1%.  This is the 006R01513 reorder number toner.

I'd assume this is either a software issue, or something to do with the black toner changing since it seemed to happen suddenly after a reorder a few months back.

Any idea how I can get my printers to stop giving the wrong readings?

[Joe053204-hcl]

Did the tech fixing the non customer mode issue have any thoughts on the issue while he was there?

[fiery]

Have a tech look at the toner gauge nvm's. They were probably set to default when the battery died.