First of all, you should first determine which part of the charge is the problem. You can select the replacement socket, charging head to determine what part of the problem.
Secondly, it should be clear that if the flash charger is not original, it is likely that there is no flash charging agreement, which does not match the mobile phone with flash charging function, and flash charging is likely to be a problem. It is recommended to replace the original, if the original price is slightly expensive, you can buy a third-party charger that supports the fast charge agreement, be sure to pay attention to the brand charger although it is expensive to sell or there is a reason.
Fast charging if the charge intermittent, then you have to check your charger is not abnormal, or your mobile phone battery is not a moment, if you have a battery abnormal situation to power off in time, and then continue to use, because the number of batteries also help me with, continue to charge will be very dangerous, if the explosion is very terrible.