Ok , there were a few things that needed to be established …
At what point ( voltage ) does the Canon 60D stop working …
Because it is to this point we should be discharging to … Anything beyond this point is nothing ( the camera does not use it )
Now the reason I think they stop here , is because the battery is close to tapped out ( maintaining current ) …
So for safety , operation etc :
I noticed the low voltage warning at 6.64v
The camera stopped working at 6.59v
So quite possibly the correct place to stop discharging is 6.5v and not 6v , simply because anything past 6.5v is not utilized by the camera …
This is so for all batteries including the Canon battery …
So establishing the cut of point for the discharge was the first thing that needed doing …
( This is all about establishing battery capacity or what is available to the camera )
And quite honestly , I don’t know if anyone has ever bothered with this before .
Canon Battery from my 60D is currently being charged with a genuine Canon charger …
Update
After resting over night the Battery Voltage was 8.18v
Started the discharge at 0.2Amp moments ago , will be discharged to 6.5v
I will also discharge the NO BRAND to 6.5v as well ( 6.5v being approximately where the camera stops functioning )
Update 2
Final result
Discharging at 0.2A to 6.5v = 1359mAh
( Generic discharged a 2nd time to 6.5v at 0.2A = 1295mAh )
The largest variable is how old is the battery ?
Anyhow , 1359mAh is the capacity to 6.5v ( 6.5v being the point the camera stops working )
I will re-test the generic battery as the first discharge was proof of concept …
The other variable I would like to know , is what sort of current draw does the camera do ?
From playing with dash cams and action cams , they seem to pull around 350mAh to 500mAh …
And the 3rd variable - Stills VS video ?
To replicate actual use , one might have to discharge at a higher rate …
I might have to Email Canon Japan , see if they will give out some info …