AAA battery size introduction

The 7th battery is a daily necessity. When you change the battery of the remote control for various household appliances, have you noticed that it may be a 7th battery? The easiest way to identify a lithium battery is the appearance. The size of the 7th battery also has this recognition function. So, let's learn the battery from the size of the 7th battery.

The 7th battery is a cylindrical battery, and it is known that the value of a cylinder is the diameter and height. There is no doubt that the size of the 7th battery is also expressed by the diameter and height. According to the IEC regulations, the ordinary 7th battery has a height of 44.5mm and a diameter of 10.5mm.

The most common disposable 7-cell batteries are carbon batteries and alkaline batteries. In the IEC (in the International Electro technical Commission) naming standard, the 7th carbon battery is written as R03, where R is round and 03 is Represents the size of the model. The No. 7 alkaline battery is written as LR03, where L stands for alkaline, R stands for circle, and 03 stands for size and size.

By the way, the US name for the 7th battery is AAA battery. In Japan, R03 is written as UM-4, LR03 is written as AM-4, and in Taiwan, UM-4 and AM-4 are called 4 Battery. Because these statements represent the same product, the size of the AAA battery and the size of the 4th battery are exactly the same as those of the 7th battery in China. However, when listening to the Japanese or Taiwanese who speak the 7th battery, you should ask him to explain the parameters of his 7th battery size and compare it with the US or IEC standards to confirm that it is China's No. 7 battery.

In the specific battery manufacturer, the manufacturer's design standards and international standards are not uniform, and the consistency deviation of the same manufacturer's battery will also occur. Therefore, domestic manufacturers generally regard the size of the 7th battery of the IEC standard as the largest. In actual production, the range of the size of a 7th battery is given, such as a diameter between 9.5mm and 10.5mm, and a height between 43.5mm and 44.5mm.

The size of the 7th battery can also be extended to the nickel-cadmium battery and the nickel-hydrogen battery in the rechargeable battery. The nickel-cadmium battery gradually withdraws from the market due to the harmfulness of cadmium, and is rarely seen in the market. But in the large and small electronic market, if you see a light green battery that is the same size as the 7th battery, it is generally a 7th nickel-metal hydride battery.

Because the size of the 7th battery is small, its capacity is also small, so the 7th battery is suitable for small or small battery discharge electrical appliances. But the convenience of the size of the 7th battery made it popular on the market, giving manufacturers the power to improve the performance of the no. 7 battery.

The page contains the contents of the machine translation.