Wifi greyed out after that my battery dying faster

Midoring Said:

"My wifi greyed out and after that my battery starting to dying faster even when don't use my phone and turn on the airplane mode, it dying very quick"

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Troubleshooting iPhone Battery Draining:

Refer to the Following...

A. Battery Drain Info:

The iPhone battery will drain, unless it is plugged in and charging. With lots installed, the charge would be slower. As for how fast it would drain the battery, that would depend on the battery health and the volume (sound) you use.

1. Go Here: iPhone Battery and Performance - Apple Support
2. Scroll Down: to "Your battery's maximum capacity"

B. Troubleshooting the Battery:

• iPhone Battery and Performance - Apple Support

• Charge and Monitor the iPhone Battery - Apple Support

• About the Battery Usage on your iPhone - Apple Support

• About Optimized Battery Charging on your iPhone - Apple Support

• If you see "Your iPhone Battery may Need to be Serviced" - Apple Support

• Use Low Power Mode to Save Battery Life on your iPhone - Apple Support

Setting > Battery > BatteryHealth. If "Maximum Capacity is lower than 80%, replace the battery. As to the odd behavior, if health is very low the iPhone may be shutting things down in a panic to keep "core" elements going.