No. 5 and No. 7 batteries are two types of dry batteries that are commonly found in our daily lives, and they are different in size and purpose.
The size five battery, also known as the AA battery, has a diameter of 14mm and a height of 49mm. Whereas, the number seven battery, also known as the AAA battery, has a diameter of 105mm with a height of 445mm。Therefore, the number five battery is a bit larger than the number seven battery.
The uses of the No. 5 and No. 7 batteries are also different. No. 5 batteries are usually used in some devices that require a large amount of power, such as remote controls, flashlights, electric toys, etc. Whereas, the size seven battery is usually used in some devices that require less power, such as clocks, calculators, remote controls, etc.
It is important to note that different devices may require different types of batteries, so when using batteries, you need to choose the right battery according to the requirements of the device. At the same time, when using the battery, it is also necessary to pay attention to the positive and negative direction of the battery, so as to avoid damage to the device caused by the reverse use of the battery.
Overall, the number five battery is a bit larger than the number seven battery, and they also serve different purposes. When using the battery, you need to choose the appropriate battery according to the requirements of the equipment, and pay attention to the positive and negative direction of the battery.