My iPhone XR starts turning off at 70% battery

Hello~ What is your battery health? Click on below and review…

Check the iPhone battery health and usage - Apple Support

If your battery health is at 80% or below …it may need replacement. Click on below…

Genius Bar Reservation and Apple Support Options - Apple

Find Locations

~Katana-San~

When was the last time that you replaced the battery?

What is the current Maximum Capacity of the battery?

Settings > Battery > Battery Health & Charging > Maximum Capacity

If Max Capacity is 80% or less, replace the battery at an Apple authorized service shop.