None of those practices would be improper anyway; none of them should pose any risk of battery damage. If it's indeed something you're doing, I would look more toward mechanical factors. Were you putting frequent stress on the frame, perhaps by sitting on the phone or using too tight a case?I am chalking it up to something that I must be doing - but I can't figure out what since I don't charge it when it doesn't need charging. I typically let it go through a cycle before recharging. I don't do anything special. I don't leave it plugged in forever. I actually do not use Fast charge all the time since most of my chargers were not.