Been using fast charging since it became available and all my batteries were 95% health or higher when I sold them. No “raping” occurred.Haha use what ever charger makes you happy. When I had my 6s I used my iPad charger as it was nesseasary to charge the 6s all the time. Killed that battery pretty fast. This time I don’t need to rape that battery while charging as the capacity is now much better. So I can allow myself to charge it slowly and cool.