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What happens if a smart lock's battery dies?
Smart door locks warn you when the battery is low, and the door still opens if it runs out. Here is how.
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It is the first question everyone asks about smart locks: “Will I be locked out if the battery dies?” The short answer is no.
The lock warns you in advance
When the battery starts to run low, the lock gives a sound or light warning, and models with an app also send a notification to your phone.
If the battery runs out completely
Most models have an emergency power input you can connect from outside, plus a backup mechanical key.