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When the temperature drops to a certain level, it can exert considerable negative impacts on the performance of many electronic devices. Take smart locks as an example: the failure rate of fingerprint recognition in winter is noticeably higher than usual. Fluctuations in temperature can trigger a variety of malfunctions, disrupting normal usage and even causing the lock to break down entirely. Some distributors have reported a sharp increase in after-sales service requests for smart locks as soon as winter arrives.

In this issue, we will take a closer look at the key precautions for using smart locks in winter, as well as practical maintenance and preventive measures to keep them in good working order.

1.Check the Battery Level Frequently and Contact After-Sales Service Promptly If Any Battery Abnormality Occurs

At present, most smart locks are powered by lithium batteries or dry batteries. However, in extreme cold, even if the lithium battery compartment is installed on the indoor side, it will still be affected by low temperatures, resulting in a significant reduction in overall battery life. Therefore, when using your smart lock in winter or during sudden temperature drops, you need to check the battery level frequently. If low battery is detected, remember to replace the batteries in a timely manner. In addition, if you notice battery damage, leakage, or other abnormalities, be sure to contact the manufacturer’s after-sales service immediately.

For smart locks powered by dry batteries, alkaline dry batteries are highly recommended. First, alkaline batteries have a much higher capacity than ordinary dry batteries. Second, the chemical components inside alkaline batteries are stable, ensuring a steady discharge rate. Compared with lithium batteries, they are less susceptible to low-temperature impacts. You can keep a few extra batteries at home in winter to deal with unexpected situations.

2.Discharge Static Electricity to Prevent Recognition Failure

Static electricity is likely to build up when using a smart lock in low temperatures or dry weather, which may occasionally interfere with the recognition function. If you tend to generate static electricity in winter, you can discharge it by touching a metal object before operating the lock.

3.Pay Attention to Finger Temperature and Moisture to Improve Fingerprint Recognition Accuracy

After winter sets in, temperatures drop drastically, leaving people’s skin extremely dry. Excessive skin dryness, along with issues like peeling caused by dryness, can lead to fingerprint recognition failure and thus lock opening problems. In such cases, you can breathe gently onto your fingertips to warm them up, ensuring smooth operation of the live fingerprint recognition function.

Furthermore, people usually apply hand cream on their hands in winter. If the layer of hand cream is too thick, it will also impair the accuracy and speed of fingerprint recognition. Similarly, wet hands can also interfere with fingerprint scanning. In such cases, you can wipe the finger to be verified several times to remove the hand cream.

Finally, if fingerprint recognition fails repeatedly, try repositioning your finger and scanning it from different angles. If none of the above methods work, it is recommended that you use a passcode as your primary unlocking method.

4.Wipe the Fingerprint Sensor Regularly with a Soft Cloth

If fingerprint verification still fails despite your finger being at an optimal temperature and moisture level, the problem may lie with the fingerprint sensor—for example, dirt buildup on the sensor can compromise the accuracy of fingerprint scanning.

In such cases, you need to clean the sensor with a dry, soft cloth. Never use hard materials such as steel wool; doing so may scratch the sensor and impair its function.

5.Open Windows Regularly for Ventilation to Prevent Short Circuits Caused by Condensation

The battery compartment of the vast majority of smart locks is designed on the inner back panel. When indoor temperature and humidity are high while the outdoor temperature is low, the influx of cold air into the room can easily cause water droplets to condense on the back panel. If these droplets seep into the battery compartment, they may lead to battery short circuits and disrupt the normal operation of the smart lock.

Therefore, when encountering a sharp temperature drop, remember to close doors and windows tightly before going out, and ensure that all doors and windows are properly sealed to minimize the entry of cold air into the room. Finally, open windows appropriately for ventilation to expel indoor moisture.

"Water Damage Is a Critical Foe for All Electronic Devices" This rule applies to every electronic product. Take mobile phones for example—non-waterproof models are usually rendered useless if they get wet, and smart locks are no exception. At present, most smart locks are not subject to strict waterproofing standards. What’s more, some locks have inadequate or insufficient waterproofing measures for their internal electronic components and circuit boards. Once water seeps in, the locks are highly likely to malfunction.

Therefore, users should avoid using standard smart locks outdoors (opt for professional outdoor-rated smart locks instead) to prevent unnecessary troubles. Additionally, when returning home on rainy or snowy days, be careful not to let water from your rain gear drip onto the smart lock. If the lock’s exterior comes into contact with liquid or salt spray, wipe it dry immediately with a soft, highly absorbent cloth.