With the popularity of smart TVs, Internet set-top boxes, etc., we will find that remote controls are also ultra-thin and compact, and the batteries inside have changed from the previous AA or AA batteries to 3V.Button battery.A closer look shows that there are some types of batteries such as CR2025 and CR2032. The CMOS battery on the desktop motherboard is also one of these 2 models.

Let’s first look at the differences between the two most commonly used button batteries. The rated current of the two rechargeable batteries, CR2032 and CR2025, is the same, both 3V. The difference is the specification and volume of the rechargeable battery. The capacity of CR2032 is 210 mAh. , the capacity of CR2025 is 150 mAh, the thickness of CR2032 is 3.2 mm, and the thickness of CR2025 is 2.5 mm.

Take CR2025 as an example to explain the meaning of the battery model code. c represents a chemical battery with lithium metal as the negative electrode and manganese oxide as the positive electrode. r represents the cylindrical shape of the battery. The first two digits, 20, represent the battery’s diameter of 20 mm, and the last 2 The digit 25 represents the battery thickness of 2.5 mm

In addition to these two types of batteries commonly used in smart TVs and Internet set-top boxes, these batteries are also used for Bluetooth access control of many batteries. Generally, the two types of batteries can be used instead if the size allows. There are also button batteries.

For this type of rechargeable battery, most of them are 1.6V too thin. There are many model codes that are inconsistent. Check the corresponding sizes and capacities of different models from the figure below. LR and AG series button batteries are 1.5V button batteries. Button alkaline manganese battery.

In addition to RV series rechargeable batteries and AG series rechargeable batteries, there are also LIR series rechargeable batteries. The first two digits of the battery code, LR, represent the mercury rated voltage of 1.5V, SR represents the mercury voltage of 1.55V, and CR represents lithium of 3V. Voltage, ZA represents the zinc-air voltage of 1.4V, and LIR represents the secondary lithium voltage of 3.7V (ie, rechargeable battery).

In this way, if you understand the above knowledge and see a similar button cell, you can know its meaning. How to select and replace it is no longer difficult. Has this short popular science article increased your knowledge?