Never charged. I took it out of the mailbox, opened the packaging checked to make sure it was what I ordered, put it back in the package then stuck it on the shelf. It hasnt seen daylight since. The only charge it had was whatever it left the factory with.
I had 5 lipos swell when I was out of the country for almost 90 days. I followed every body's advice and left them half charged. Every one of them puffed the cell that was on top - 2S or 3S, it was top cell that went bad.
I was supposed to be gone only for a month, that might have been ok, but from now on, I'll store mine starting fully charged.