1. Open the \"Settings\" menu of the phone, enter the Settings and click the \"Battery\" option;
2, then turn off the \"low power mode\" switch, then you will find that the battery icon is not yellow;
3, low power mode is Apple began to add in ios9 system version. When Low Battery mode is enabled, the battery icon turns yellow. Low power mode can extend the iPhone's battery life by three hours. Other performance improvements in iOS 9 will extend battery life by an hour without turning on low power mode.
The phone charging grid turns yellow to remind the phone that it is time to charge. The yellow cell phone charging grid is an outward sign of economy. Save time, save electricity. How much electricity can be saved in a day, you can know by looking at the mobile phone charging grid. The phone charger should be taken out to charge the phone, which will not affect the use of the phone and will not affect the service life of the phone. The phone charging grid turns yellow to protect the phone.
Mobile phone charging grid yellow, at this time you can turn off the power saving mode of the mobile phone can be restored to the original state, because some mobile phone charging grid yellow, because you turn on the power saving mode inside the mobile phone, so it becomes yellow, if you want it to change back to the original, only after the power saving mode can be restored to the image before.
That is the phone set the power saving Settings, as long as the power is low to a degree, the charging cell will turn yellow, do not, click the power saving mode, uncheck it.