I mentioned it before, the batteries are rated at 4V, so about 80% of LiCo limit charge at 4.2V
@inetdog
Concur with your 20% spare margin at the expense of destroying batteries.
But, I don't buy this, inline what we have seen and documented in this thread, and according to the NYT report, ANA clearly found several operational failures which had nothing todo with "operational misuse".
http://www.nytimes.com/2013/01/30/bu...anted=all&_r=0
After all, what is the foundation of this business? Following procedures.