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In recent years, with the popularization of smart door locks, they have brought great convenience to users, yet they have also caused numerous headaches. 

Some of these issues are not attributable to product quality; many are instead the result of improper user operation. For example, using low-quality batteries to power the locks leads to insufficient battery life, frequent battery replacements that disrupt the user experience, or battery leakage from inferior cells that renders the locks inoperable. In severe cases, it can even corrode the lock's mainboard beyond repair.

Not long ago, a netizen reported on Weibo that several hotel door locks, installed just a year prior and used infrequently, suffered from severe battery leakage, leaving the locks corroded and unusable. Coincidentally, another netizen also complained on Weibo about a lock that was damaged beyond repair: due to prolonged inactivity, the battery leaked and burned out the power supply board.

Beyond corroding the lock's mainboard due to battery leakage, insufficient battery life is also one of the most frustrating issues encountered by users. On several consumer complaint platforms, netizens have lodged complaints such as the following: After purchasing a set of batteries and installing them in the door lock, the batteries died within less than a week. The user had to buy new batteries from another store and hire a locksmith to gain entry. When contacting the seller, they were refused a refund; turning to the platform customer service for mediation yielded no resolution after a month. The user is now demanding a full refund and compensation for the losses incurred.

Furthermore, some users have found themselves unable to obtain after-sales service from the lock manufacturers after their smart door locks were damaged by battery leakage. Manufacturers argue that the locks themselves are of high quality; the inoperability is caused by the corrosion of the mainboard due to the use of low-quality batteries, and thus the cost of repair should be shared by the user, the battery supplier, and the lock manufacturer. Our editors at Door Lock World have found that such after-sales disputes over smart door locks caused by battery issues are far from uncommon.

The cases above illustrate that choosing the right batteries for smart door locks is of critical importance. So, what kind of batteries should be used for smart door locks? In fact, to withstand the harsh operating environments of door locks, leading battery manufacturers such as Shuanglu have long launched smart door lock-specific batteries. Moreover, major lock brands, aiming to deliver a better user experience, mostly pre-install Shuanglu and other smart door lock-specific batteries as standard equipment.

To summarize: 

First, choose batteries produced by well-established battery suppliers; 

Second, opt for smart door lock-specific batteries whenever possible.

Why use smart door lock-specific batteries? To answer this question, we must first understand the harms posed by low-quality batteries for locks:

Impact on users

1. Poor battery capacity and insufficient battery life

Many users receive low-battery alerts on their mobile apps within days of replacing batteries, leading to the frustration of frequent battery changes. This shortage of battery life in smart door locks is most often caused by the use of low-quality, cheap batteries. In reality, while low-quality batteries seem cheaper upfront, the cumulative cost of frequent replacements far exceeds that of high-quality smart door lock-specific batteries.

2. High risk of leakage and mainboard corrosion

Battery leakage in long-term use is a common issue in household devices like remote controls and toys, but damage to such items rarely disrupts daily life. Smart door locks, however, are high-frequency, home security products that users rely on for daily entry and exit. Being locked out due to battery leakage causes immense anxiety. Furthermore, leakage-induced corrosion or rusting of the lock's mainboard often results in denial of after-sales service from manufacturers, as the damage is deemed non-product-quality related.

3. Performance degradation in cold weather

As widely known, door locks operate in harsh environments, especially in northern regions during frigid winters. Low-quality batteries suffer from reduced discharge capacity under low temperatures, leading to unresponsive locks or malfunctions. Additionally, their battery life diminishes significantly in cold conditions, severely compromising the user experience.

Therefore, for users, choosing smart door lock-specific batteries produced by reputable brands such as Shuanglu offers dual benefits. On one hand, it extends the battery life of the lock, ensuring that family members are never locked out upon their return. On the other hand, it protects the lock itself, eliminating the risk of damage caused by battery leakage. 

For manufacturers, equipping products with Shuanglu’s smart door lock-specific batteries at the factory not only delivers a comfortable, secure, and reassuring user experience but also minimizes unnecessary disputes and after-sales issues arising from battery leakage, short circuits, and related malfunctions.