lithium question

Before I bought my 2 Battleborns a few years ago, I did a ton of research trying to convince myself they are worth the money. I seem to remember that the 100ah Battleborns are actually like 110 or 120ah. They set the bms to limit charge and discharge so the battery can only use 100ah. That way the battery never charges fully and never discharges fully, but you still get 100 useable ah. The battery does the 10-90 for you automatically.