QUESTION & ANSWER
Question 1: Will fast charging ruin my iPhone battery?
Please don’t worry, the fast charging will only happen in 0%~50% battery situation, when the battery level approaches 50%~60%, the charging speed will gradually slow down. When 80%, it will be charged at normal speed and take about half an hour to get your iPhone fully charged.
Question 2: Can I leave the charger plugged in my car cigarette lighter all the time?
Yes, you can. The charger will power off when the car is off.