1. Charger problem
With the original charger, if your phone is still not charged, then you can change a charging cable to try, if still not, it is likely to be the phone itself has a problem.
1, the battery is excessively worn or completely damaged
In general, this situation is relatively rare, you can check the health of the battery first. For the average iPhone, a battery health rate of more than 85% in one year and more than 75% in two years is normal. But if you're down 80 percent in one year, there are only two possibilities. One is that you're buying a fake, and the other is that you're doing something to damage the battery. I have seen some people, because the card game almost every day to charge several times, as a result of less than half a year, the health of the mobile phone battery has dropped to 78%.
3. Other questions
In addition to these common problems, there are also some problems, such as mobile phone interface failure, poor battery contact and so on.
When the cause of the malfunction is determined, we need to treat it right now. But be sure to remember not to open privately, if repeatedly cause other failures will not be worth the loss. It is best to find a professional to do, and now a lot of on-site maintenance is also very convenient, you can check the App Store inside
Cause: Possible charger problem
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Solution: Use the original charger, if your phone is still not charged, then you can change a charging cable to try, if still not, it is likely to be the phone itself has a problem.