Best for Key override reliability
Aqara U50 Smart Lock
4.5 feature score
Highest scored product for this feature based on supporting review evidence.
Best Aqara Smart Home for Key override reliability
Key override reliability Decision Dashboard
Safest pick
Aqara UWB Smart Lock U400
4.3 feature score
Balances feature score, supporting reviews, and overall product strength.
Most evidence
Aqara Smart Lock U100
3 supporting reviews
Has the broadest review evidence for this feature.
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Physical key backup and rekeying were praised, especially the hidden keyhole and the convenience of matching existing keys.
Pros: Access logs, Value and Price
Cons: Warranty and support, Wi-Fi
Reviewers liked retaining a physical-key fallback, framing it as a useful mechanical backup rather than a compromised smart-only design.
Pros: Locking reliability, Lock/unlock speed
Cons: Bluetooth, Physical attack resistance
The physical key remained a useful backup, but reviewers framed it more as emergency insurance than a primary access method.
Pros: Lock/unlock speed, Fingerprint
Cons: Keyway quality, Wi-Fi