What if my phone battery dies during QR passkey authentication?

Q: What if my phone battery dies during QR passkey authentication?

If your phone battery dies while scanning a QR code for passkey authentication, you can use an alternative authentication method such as a synced passkey from a cloud service (Google Password Manager, iCloud Keychain), a FIDO2 hardware security key, or another logged-in device. To prevent lockouts, keep a hardware security key as a backup or ensure your passkeys are synced across multiple devices.

What If My Phone Battery Dies During QR Passkey Authentication?#

Passkeys often rely on QR codes for cross-device authentication, where a phone with the passkey scans a QR code to authenticate on another device. But what happens if your phone battery dies mid-process?

Alternative Ways to Authenticate#

If your phone battery dies while trying to authenticate via QR code, you can use the following methods:

Synced Passkeys: If your passkeys are stored in Google Password Manager, iCloud Keychain, or another cloud service, you can access them directly from another logged-in device.
Hardware Security Keys: If you have a FIDO2 hardware security key (e.g., YubiKey, Titan Key), you can use it instead of your phone to authenticate.
Platform-Specific Authentication: If the device you are trying to log in to supports Windows Hello, Face ID, or Touch ID, you may be able to authenticate without the QR code.
Backup Device: If you have another device (tablet, secondary phone) with access to your passkeys, you can scan the QR code from there.

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Best Practices to Prevent Lockouts#

To avoid authentication issues due to a dead phone battery:

Ensure your passkeys are synced to a cloud service, allowing access from multiple devices.
Carry a hardware security key as a backup authentication method.
Charge your primary authentication device or keep a power bank handy to prevent disruptions.

While QR passkey authentication provides a seamless login experience, having fallback authentication methods ensures you're never locked out due to unexpected issues like a dead phone battery.

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About Corbado

Corbado is the Passkey Intelligence Platform for CIAM teams running consumer authentication at scale. We help you see what IDP logs and generic analytics tools can't: which devices, OS versions, browsers and credential managers support passkeys, why enrollments don't turn into logins, where the WebAuthn flow fails and when an OS / browser update silently breaks login, all without replacing Okta, Auth0, Ping, Cognito or your in-house IDP. Two products: Corbado Observe layers observability for passkeys and any other login method. Corbado Connect adds managed passkeys with analytics built in (alongside your IDP). VicRoads runs passkeys for 5M+ users with Corbado (+80% passkey activation). Talk to a Passkey Expert →