Smart door lock battery how to buy common 5 AA battery purchase guide

In recent years, smart homes have become popular, and the first to be popular is the smart door lock. Smart locks have many advantages over traditional mechanical locks, such as fast unlocking, no need to take the keys when going out, etc., which is more convenient to use. With the popularity of smart door locks, users will inevitably ignore some of the problems brought by intelligence. Take the AA dry batteries that need to be used in smart door locks: there are many types of batteries, such as carbon batteries, alkaline batteries, and lithium. Iron batteries, but most people's battery purchases still stay in the supermarket to buy a few dry batteries, anyway, can be used normally, I do not know that some batteries are not suitable for smart door locks.

It should be known that the battery is long in the smart door lock, generally available for half a year or one year, but it is also because of the long service life, we usually open the battery compartment to check whether the battery leaks, or even forget the battery in the door lock. In fact, the longer the ordinary alkaline battery is used, the greater the probability of liquid leakage and the more serious the leakage. Not only does the corrosion damage caused by the smart door locks, but it also brings inconvenience to our access.

So, in the face of the variety of AA batteries on the market, which one is suitable for smart door locks? The following is an analysis of the batteries that will be most exposed to us from the day (there will be a comparison table at the end of the article):

1, carbon battery

Carbon battery, our first generation disposable battery, its capacity is basically around 500mAh, low discharge current, suitable for use in equipment with ultra-small current discharge, such as remote control, calculator doorbell. However, due to the serious pollution of the battery industry, with the development of the battery industry, carbon batteries have been seen everywhere from the supermarkets and convenience stores, and have become carbonous and gradually leave people's eyes.

2, alkaline battery

This is the most common and easiest to buy battery. Alkaline batteries have a higher capacity than carbon batteries and generally reach 900 mAh. The price is also moderate, so the market is very popular, which makes alkaline batteries seem to be the best choice for smart door lock batteries. At present, the alkaline battery accounts for the largest proportion in the market, after all, the century-old brand.

However, alkaline batteries have two disadvantages, one is easy to leak. I believe that everyone has a deep understanding that the alkaline battery uses a battery for about one year, and the inside of the battery flows out of the liquid, causing the battery slot to rust and damage the equipment. Its liquid pollution component is relatively small, but it can not be said that 0 mercury 0 cadmium. If there are children in the family, you need to pay attention; second, the battery has poor low temperature performance. At minus 10 ° C, only about 15% of the power at room temperature can be released. After December, the northern part of China has entered the winter, and the temperature in the northern part of Heilongjiang can reach minus 10 °C. If the smart door lock or outdoor equipment is used at home, it is extremely prone to the situation that the equipment can not work normally, such as insufficient power to unlock. The speed is slow; therefore, families in the North or families with children need to be cautious.

3, lithium iron battery

The lithium iron battery is a disposable dry battery after the "carbon battery" and "alkaline battery". Compared with the previous two generations of batteries, this battery has a more outstanding performance advantage. It is suitable for all 1.5V devices, not only can discharge at low current, but also sustain high current discharge, such as high current discharge on the flash. The main thing is that this battery does not have a liquid liquid, and the structure is closed in three layers. Even if it is used for a long time, it will not damage the equipment due to leakage. In addition, the low-temperature performance of the battery is the best in the disposable battery. It can also discharge most of the electricity in the environment of minus 10 °C, so that the battery is popular among northern families.

Because foreign governments attach importance to environmental protection, the raw material of this battery is composed of lithium and iron, 0 mercury and 0 cadmium. Therefore, alkaline batteries have been gradually replaced. However, due to the high technical barriers of the battery and the high cost of knowledge, the domestic lithium-iron battery brand has the largest proportion of time-resistant batteries, and because of the relatively high price of carbon and alkaline batteries, it is generally used. Super is also very difficult to buy, only Tmall is available for sale.

4, nickel-cadmium battery

The previous paragraphs are all disposable dry batteries, which are scrapped after use. The nickel-cadmium battery is a kind of rechargeable battery, which has excellent discharge current, excellent low-temperature discharge performance, no leakage, low internal resistance, and the price is a cheap rechargeable battery. These advantages make the nickel-cadmium battery look It is suitable for use on smart door locks, but it is not. Nickel-cadmium batteries have two fatal shortcomings. First, the battery capacity is small, only about 800mAh, which is almost the lowest among rechargeable batteries. In addition, the battery is self-discharged at 25°C at room temperature, and the monthly loss of full charge is 25%- 30%, power is exhausted in about 3 months. Small capacity plus high self-discharge, basically need to be used with the charge, think about 2, 3 months to charge the battery once, but also always pay attention to the battery has no electricity, few people can stand it. Cadmium is also a heavy metal, which is seriously polluting the environment. Some big brands have not produced nickel-cadmium batteries.

5, nickel-hydrogen battery

Nickel-metal hydride battery has been a very mature battery after years of development, up to 2700mAh capacity, the number of cycles can reach 500 times, the internal resistance is only about 40 milliohms, the super-large discharge current close to 10A, and the nickel-cadmium battery The low-temperature discharge performance, combined with the cost of a few cents for a single use, makes nickel-metal hydride batteries a popular rechargeable battery. At present, nickel-metal hydride batteries are mainly used in high-current discharge equipment such as strong light bulbs, electric razors, camera flashes, electric toothbrushes, etc., good discharge capacity, good low temperature performance and large battery capacity, small self-discharge, used in intelligence The door lock is also good.

At present, nickel-metal hydride batteries mainly have Panasonic Aileu, Nanfu, and time-resistant quality and other reliable choices. Considering that the price of nickel-metal hydride batteries is relatively high, it also needs to be used with a dedicated charger. The single-time investment is too high. In the smart door lock, it can't be charged once a year. It is completely anti-aircraft guns and mosquitoes, but it is not economic. Affordable. In addition, the nickel-hydrogen battery does not pay attention to the number of cycles and does not reach the nominal value.

Finally, for the above-mentioned various types of batteries, summarize:

1, lithium iron battery:

In addition to the higher price, the lithium iron battery with large capacity, low self-discharge, no leakage, and low temperature resistance is suitable for 80% or more AA batteries. If the price per mAh is calculated, the lithium iron battery is more carbon than The battery is also cheaper and is most suitable for smart door locks.

2. NiMH battery:

Nickel-metal hydride batteries with high capacity, low self-discharge, and good low-temperature performance can also be used in smart door locks. However, the one-time investment of battery and charger is too large, basically all of them are above 100 yuan. Reducing the cycle life is more troublesome than the lithium-iron battery thrown when it is used up.

3, alkaline battery

Alkaline batteries are good in general, but poor liquid leakage and low temperature performance are their fatal shortcomings. When used on smart door locks, they will damage the smart door locks. For the northern family, there will be insufficient unlocking power in winter.

4, carbon battery

Carbon battery capacity is small, low temperature discharge is difficult, and there is no advantage over alkaline batteries. It is on the edge of elimination and is not recommended for use on smart door locks.

5, nickel-cadmium battery

Nickel-cadmium batteries have small capacity, large self-discharge, need to be recharged frequently, and will become seriously polluted, so be careful when using them.