What are the downsides of using a smart lock include several practical, security, and cost considerations that homeowners should weigh. First is battery dependence, smart locks run on AA batteries that last 6 to 12 months and require replacement, and if batteries die you can be locked out unless you carry backup key or know emergency power trick with 9 volt battery. Second is reliance on wireless technology, WiFi or Bluetooth outages can prevent remote unlocking, notifications, and voice control, though local keypad and fingerprint still work. Third is higher upfront cost, $150 to $300 versus $30 for traditional deadbolt. Fourth is cybersecurity risk, if your app password is weak, phone is hacked, or firmware not updated, attacker could potentially gain remote access, though reputable brands use encryption and two factor authentication. Fifth is complexity and learning curve, setup, app pairing, and guest code management require tech comfort. Sixth is compatibility, not all doors meet thickness and bore requirements. Seventh is potential electronic failure, motor can fail. Eighth is privacy, some locks log entry data to cloud. Despite these downsides, most users find benefits outweigh risks with proper maintenance, strong passwords, and backup key.
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