CR1220 battery

What is the difference between cr1220 and cr2025 batteries?

The difference between button battery cr2032 and 2025

1. The battery capacity is different, the former is 2100mAh and the latter is 150mAh.

2. The battery life is different, and the battery life of 2025 is relatively long.

3. The size is different. The size of button battery 2032 is larger than that of 2025.

4. The weight is different. The 2032 battery is slightly heavier than the 2025 battery.

CR2025 battery: where C-is a chemical battery system with lithium metal as the negative electrode and manganese dioxide as the positive electrode, R-indicates that the shape of the battery is cylindrical, if it is square, replace it with F, 20 indicates that the diameter of this battery is 20mm, 25 means the thickness of this battery is 2.5mm. The nominal voltage is 3.0V, the endpoint voltage (endpointvoltage) is 2.0V, and the rated capacity is 140-170mAh.

CR2032: Lithium manganese dioxide battery, named according to IEC standard. Among them, C- indicates a chemical battery system with lithium metal as the negative electrode and manganese dioxide as the positive electrode. R- indicates that the shape of the battery is cylindrical. The height is 3.2mm. The nominal voltage is 3.0V, the endpoint voltage is 2.0V, and the rated capacity is 200-240mAh.
Can button batteries cr2032 and 2025 be used in common?

It cannot be used universally. The thickness is different, the amount of active material filled is also different, that is, the capacity is different.

There may be poor contact and no power supply, and the possibility of a dead battery cannot be ruled out.

Theoretically, it is possible to use 2025, because both 2025 and 2032 are button-type lithium-manganese batteries, and the discharge curve of the battery is basically the same, but the height of 2032 is 3.2MM in appearance, while that of 2025 is 2.5MM, and the capacity of 2032 It is 210MAH, and 2025 is 150MAH, so as long as the battery holder for the battery can fix the 2025, there is no problem in using it, but it is better to use CR2032 batteries.

How long does the CR1220 battery last for the stm32f103

Usually 2-3 years.

CR1220 has a nominal voltage of 3.0V, an endpoint voltage of 2.0V, and a rated capacity of 40mAh, which vary by manufacturer. The standard storage period of CR batteries is 1 year, which is advertised by the manufacturer for the after-sales responsibility of customers. Self-discharge within 2% of the material properties can be fully realized, and the actual service life of 2-3 years is no problem.

There is a difference between the storage of CR batteries under load and no load. When the load is used, a discharge current is generated, and the internal materials will not be passivated. However, if it is simply stored for 3-6 months, the internal lithium sheet will generally be affected by the environment and self-discharge. The passivation phenomenon of the material (this is a characteristic of lithium materials, including Japanese domestic products and polymer lithium batteries, etc.), and the passivation phenomenon can be eliminated by short-circuit current before use.