iPhone 17 Pro won't turn on after battery drained

There have been multiple reported instances of iPhone 17 and iPhone 17 Pro models failing to accept charge if the battery charge becomes low or fully exhausted - as you have experienced. A software patch, that explicitly addresses this iPhone 17 issue, has been released - this being iOS 26.5.1.

About iOS 26 Updates - Apple Support

Connect your iPhone to its Power Adapter and allow the iPhone to charge, undisturbed, for at least 24 hours. Then, if the iPhone will restart, keep the iPhone connected to external power - and immediately update to iOS 26.5.1.

If the iPhone will not restart, seek assistance directly from Apple Support. You can contact the Support Team using the Support link at top-right or bottom-left of this page.

You can also initiate and manage your support cases from Apple devices using the excellent Apple Support App. If not already installed, the App can be downloaded from the App Store:

https://apps.apple.com/app/apple-support/id1130498044

You might also visit the Genius Bar at your local Apple Store or Apple Authorised Service Provider (AASP) - where the technicians will be able to assist with troubleshooting and performing the required software update:

Genius Bar Reservation and Apple Support Options - Apple

Keeping in mind that the charge level of modern lithium batteries should never go below 15-20%, and if you are sure that your power supply and cable are working correctly, it could be a hardware problem (battery? charging port? other internal component?).

Also, did you update your 17 Pro to the latest iOS version, now 26.5.1? (that version is specific for battery charging issues)

If you already updated to no avail, since your device is covered by warranty, I suggest that you contact Apple Support directly, using this link:--> Contact Apple for support and service , or even better make an appointment (*) and have your device inspected at an Apple Store or AASP (Apple Authorized Service Provider) among this list:--> https://locate.apple.com/choose-country-region . After checking it out, they'll give you all the available options.

Regards

Giulio

(*) You can do it:

• Online:--> Genius Bar Reservation and Apple Support Options - Apple;
• Contacting a local Apple Store or AASP among the list provided above;
• Using the "Apple Store" app, available and downloadable from AppStore.

Additional to my earlier reply to this thread, if you have access to an Apple MagSafe charging adapter for your iPhone, or other wireless charger (such as found in some cars), you may still be able to recharge your iPhone.

• How to use your MagSafe Charger with iPhone - Apple Support
• MagSafe chargers and battery packs for iPhone - Apple Support

Check your charging cable and USB adapter for signs of damage, such as breakage or bent prongs. Don't use damaged accessories. A Lightning to USB cable and a ...Read more

If your iPhone or iPod touch won't charge

Search for accessories that have completed MFi certification. Once an accessory has completed MFi certification requirements and is reported to Apple as sold/distributed, it will be searchable in our public database of authorized Lightning, headset, charging, iAP-enabled, and Find My network-enabled accessories.

Learn how to identify counterfeit or uncertified Lightning-based accessories.

You may try this (The suggestion is intended as a guide to help you find the right options and should not be interpreted as an endorsement or promotion of any product. Please conduct your own research and make an informed purchasing decision.) --> Apple Mfi-Certified, Type C Female to Lightning Male OTG ...

Sdiazzz wrote:

Thank you all for your help.

I left the phone off the charger while waiting for a wireless charger to arrive. In the end, I didn’t need it after all, as the phone suddenly powered back on and is now working normally.

I appreciate everyone’s suggestions and assistance.😊

You're very welcome.

Now that the iPhone has powered-on, keep it connected to the Power Adapter and update to iOS 26.5.1. This step is essential as the this update, explicitly for iPhone 17 models, patches the problem that inhibits charging of a low battery.

This may help you --> When to charge your iPhone or iPad - Apple Community

My pleasure :)