No, currently there are two types of watch batteries, one is alkaline battery and the other is silver oxide battery. The silver oxide battery is commonly used today because its discharge is always very stable and does not change over time like an alkaline battery. It gradually decreases, and the voltage drops suddenly when the final lifespan is reached. . . Please adopt! ! !
Common rechargeable and non-rechargeable batteries include 3.6V rechargeable lithium-ion coin cell (LIR series) and 3V rechargeable lithium-ion coin cell (ML or VL series) ). Non-rechargeable batteries include 3V lithium manganese button cells (CR series) and 1.5V alkaline zinc manganese button cells (LR series and SR series).
The code for button batteries generally has an R followed by a number. These numbers directly represent the diameter and thickness of the battery, like button lithium CR3032, which refers to a diameter of 30mm and a thickness of 32mm. Some special diameter and thickness codes, such as LR41, refer to an alkaline battery, a. A diameter of 7.9mm and a thickness of 3.6mm, SR43 refers to the silver oxide battery, 11.6mm in diameter and 4.2mm in thickness.
Here are some common button batteries:
Detailed information:
Classification of button batteries
1. Lithium battery
Ordinary disposable lithium batteries are lithium manganese (code C) batteries with a nominal voltage of 3 V.
A less common type of disposable lithium battery is the fluorocarbon lithium battery (code B), which has a nominal voltage of 3 V.
In addition, common secondary lithium batteries include ML lithium batteries (code name ML), with a rated voltage of 3V.
The size number of lithium batteries generally adopts lhe new IEC numbering method. The first two numbers are the diameter (mm) and the last two numbers are the thickness (0.1mm), which are very close. each other.
2. Silver oxide
The present invention has the characteristics of long life and large capacity. The battery uses silver oxide as the positive electrode, zinc metal powder as the negative electrode, and potassium hydroxide or sodium hydroxide as the electrolyte. Electricity is produced by the chemical reaction of zinc and silver oxide.
The thickness (height) of silver oxide coin cell batteries is 5.4mm, 4.2mm, 3.6mm, 2.6mm and 2.1mm, and its diameter is 11.6mm and 9.5mm, 7.9mm, 6.8mm. four specifications.
You must choose one based on the size of its location. Commonly used models include AG1, AG2, AG3, AG1O, AG13, SR626, etc. AG is a Japanese standard and SR is an i standardninternational.
3. Silver peroxide
The structure of the battery is basically the same as that of the silver oxide button cell. The main difference is that the anode (anode) of the battery is made of silver peroxide.
4. Alkaline manganese
This battery has the advantages of large capacity, good low temperature performance, cheap materials and low price, and can meet the needs of requirements for continuous current discharge important.
The disadvantage is that the energy density is not sufficient and the discharge voltage is not stable enough. The anode of alkaline manganese button battery is manganese dioxide, the cathode is zinc, the electrolyte is potassium hydroxide, and the rated voltage is 1.5V.
5. Mercury
Also known as mercury battery, it can be used in high temperature conditions, stored for a long periode, has stable discharge voltage and good mechanical properties. However, its low temperature characteristics are not good. The battery has a positive value for mercury and a negative value for zinc. The electrolyte may be potassium hydroxide or sodium hydroxide. Its nominal voltage is 1.35V.
6. Lithium-ion
The rated voltage of the disposable lithium manganese coin cell battery is 3V, the termination voltage is 2V, and the typical operating current is 0.1-0.2mA . It uses manganese dioxide with very stable chemical properties as the positive electrode material and lithium metal with very high specific energy as the negative electrode material.
The average annual reduction in capacity does not exceed 2% and the storage life is long. The battery adopts a semi-sealed structure and is safe to use. Disposable lithium manganese button batteries have a wide plage of temperature adaptability and can operate normally from -20 to +60 degrees Celsius.
Suitable for electronic dictionaries, motherboards, CMOS batteries, watches, etc.
7. Secondary Lithium
This is a second button cell and a button cell that can be charged and discharged multiple times; rated voltage: 3.7v; charging voltage 4.2v; p>
You can see this mark on the back of the battery
LR-alkaline-1.5V
SR-silver oxide-1.55V
CR-lithium-3v battery
Zinc air-1.4V
Lithium-3.7V secondary battery
8. Chuixin
The battery has the characteristics of high energy density, good storage performance, low self-discharge and long service life. Its disadvantage is that the internal resistance of the battery is high. The positive electrode of the battery is manganese dioxide or iron disulfide, the negative electrode is a hammer, and theelectrolyte is organic matter.
The rated voltage of Li/MnO hammer battery is 2.8V and the rated voltage of Li(CF)N hammer battery is 3V.
9. Battery foot welding
Battery welding foot, also known as battery foot welding or pin battery, also known as battery foot welding.