How does my iPhone use contactless features (like Apple Pay or access cards) when the battery is dead?

Even when your iPhone’s battery is dead, it can still perform contactless functions thanks to a feature called Power Reserve. This mode allows specific services, like Apple Pay or Express Cards, to remain functional with very little power.

The key to this is the iPhone’s dedicated NFC chip, which powers contactless payments and access cards. While the main phone functions shut down in Power Reserve mode to save battery, the NFC chip remains active, enabling you to use Apple Pay, transit cards, or even unlock doors with your phone, all without needing a full charge.

So, even if your phone appears "dead," these NFC features continue to work, ensuring you can access your cards and keys until you're able to recharge.
Seritag - 28 Nov 2024