Oh my god is this alice in wonderland???? Or is everyone just tripping on LSD? Obviously a lying cheat. I'm pretty sure someone else would call them out before me on a $3000 camera. Go take a look at all the complaining in the 6D2 thread. Canon would be crucified for that big of a lie.
I have NO IDEA why people are ok with this. Putting a total of 1300-1400mAh cells in a pack and calling it 2600mAh is not a "defect". Do you really believe that? It's the EXACT same thing as you mentioned here if Canon actually published specs of 1/8000 in the manual, online, everywhere, but actually built it to do 1/4000. Exact same thing.
A defect would be a problem with the battery housing causing it to not physically fit. Or a broken tab on the battery that didn't make contact. Or solder than came loose inside. I understand that; it happens on $1000 TVs and $30,000 cars all the time. But to build a 1300mAh battery pack then market it and sell it as 2600mAh is ludicrous.
The determination of battery capacity is not an easy task, and cannot be accomplished in the manner in which you are testing. I suggest you review the content at http://mathscinotes.com ...ery-capacity-versus-load/ for some insight into the complexity of the task. When a manufacturer tests and labels batteries, something so simple as the end point voltage (per cell) will have a serious impact on the nominal capacity. One manufacturer might use an end point voltage of 3.2 volts, the other 3.0
I'd also like to point out that the capacity on the label, and the method for its determination, changed in August 2015 as part of the regulations covering the shipment of Li-Ion batteries on aircraft. Before August 7, 2015, shippers in the US measured the power of lithium batteries by “equivalent lithium content”, a simple method based on weight. Under the new rules, battery power is expressed in watt-hours, something directly related to mAh as labeled on the battery. This is the number that goes on the battery label.
Another resource worth reviewing is at http://batteryuniversity.com ...g_lithium_based_batteries.