You know how the chinese calculate capacity?

They just count the cells and multiply with the capacity of one cell. And I do not want to talk the 20.000mAh powerbanks that do fit in your pockets.
See the many 10.000mAh 1860 cells you can buy on Ebay and Aliexpress. No manufacturer can make them but the Chinese have them.....

A while ago I placed new 18500 cells in my chinese Canon battery. It was a so called high capacity battery of 2650mAh, the 2 cells inside were 1400mAh and serial connected! So it was actually a 1400mAh battery.