1, Enter the Settings -- battery\/more Settings to confirm whether the dual engine flash charge is turned on (if no switch, flash charge is turned on by default;)
2, please confirm whether to use a third-party theme or lock screen style, these themes have their own effect display, may not show the flash charging icon, it is recommended to switch to the default theme view.
3, confirm whether to use the original charger, data cable, third-party accessories specifications are different, can not guarantee to enter the flash charge mode;
4, the connectivity of the socket will also affect charging, you can replace other sockets to try charging;