How to make an appointment to replace my iPhone's battery?
my sons battery needs to be replaced I need to know how to make an appointment and the price for a battery replacement
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The battery can be replaced by Apple or an Apple Authorized Service Provider., see this Apple article:
https://support.apple.com/iphone/repair/service/battery-power
If you are going to replace the battery, read this Apple article: Get your iPhone, iPad, or iPod touch ready for service
https://support.apple.com/en-us/HT201557