iPhone XS Max battery is slowing down

kalam_english Said:

"Iphone XSMax: My phone XS Max is getting slow and off though the charge is showing 45%"

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Troubleshooting Slow iPhone Charge:

The iPhone battery will not charge, unless it is plugged in and charging. With lots installed, the charge would be slower. It would also depend on the Battery Health and how you are suing heal it is charging..  Go Here: iPhone Battery and Performance - Apple Support - Scroll down to "Your battery's maximum capacity"

View the Battery Health:

Apple recommends you get a new battery, once the Battery Health reaches 80% or lower. When the Battery Health is 80% or lower, it is time for a new battery.

1. Go To: Settings
2. Tap: Battery
3. Tap: Battery Health
4. View: [the percentage]
5. Is it 80% or less?  If so, it is time for a new battery.

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

Remember the iPhone XS Max is very old, but my iPhone is from like 2 years ago (it is an iPhone 13) and it charges fine.

For more info, please read the reply by TheLittles.