full discharges shorten the battery's life
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
As stated, yes that might be the case - but if you want a calibrated battery, then you need to tell the battery where it's at
Also I don't fully 110% discharges the battery, as I say above, I let it go down to 2-5% and then start charging it again.
I have always had great battery life in all my portable devices - do you think I'm lucky or am I doing something right with my batteries - up to you to decide