In daily life, do you have such doubts: when the remote control at home runs out of power, when going to the store, you need to buy a No. 7 battery; when the water heater or gas stove doesn't work, you need to buy a "huge" No. 1 battery. And when the mouse runs out of battery, you usually need to buy a 5th battery... so the battery only has an odd number, not an even number? If that's the case, I haven't seen the third battery either, right? What exactly is going on?, Where does the battery number come from?The battery number is usually arranged in ascending order based on the size of the battery for easy identification. Battery number 1 is the largest, battery number 5 is moderate, and battery number 9 is the smallest. According to the International Electrotechnical Commission, batteries have their own exclusive English code, which is the IEC number marked on the battery. This number represents the chemical properties, appearance, and size of the battery. Taking battery number 1 as an example, the letter L indicates that the chemical property of the battery is alkaline, while the letter R indicates that the battery has a cylindrical shape, and the number indicates that the battery size is 20. Therefore, the complete IEC number of battery number 1 is LR20.

Do batteries only have odd numbers and not even numbers? In fact, batteries numbered 1 to 9 are available, and the main reason is that batteries numbered 1, 2, 5, and 7 are commonly used household batteries, especially remote control panels, toys, wall clocks, and other types of batteries that are frequently used in household life.

Common dry battery models 1, 2, 5, 7, 8, and 9 are commonly used civilian grade dry batteries. Let's first briefly introduce these "popular members" in the dry battery family!

Firstly, there is the No.1 battery, which was most commonly used in old-fashioned flashlights before the 1970s and 1980s. Now suitable for natural gas stoves, water heaters, etc. These products use a No. 1 battery because it is the largest in size and stores the most electricity. For these daily household appliances, it will last longer, and gas stoves and water heaters do not need to be carried with you. Therefore, a No. 1 battery is the best choice.The No. 2 battery is suitable for toy electric vehicles, radios, water heaters, remote controls, flashlights, old-fashioned wall clocks, etc., and in most cases, there is overlap in the scope of use with the No. 1 battery. Although he can still buy it in the market now, with the updating and replacement of these old-fashioned electrical devices, they have gradually disappeared from the market.

The No. 5 battery is suitable for electric shavers, wireless mice, remote controls, children's toys, alarm clocks, etc. These products have very low daily energy consumption and are mostly in standby mode. They only consume a certain amount of current when the button is pressed, so the flexible and portable properties of the No. 5 battery are just right.The No. 7 battery is suitable for measuring blood pressure monitors, remote controls, children's toys, keyboards, and other objects with limited volume but low power consumption. The smaller and more compact No. 7 battery is more suitable than the No. 5 battery.The No. 8 battery is generally used as a battery pack and is also used on electronic devices with limited volume, such as high brightness fluorescent sticks, in car electronic devices, beauty pens, and other electronic products.The No. 9 battery is mostly used in some high-end electronic devices, such as touch pens, guitar built-in mixers, precision medical equipment, Bluetooth earphone devices, etc.

Unused or obsolete battery models. Although batteries 3, 4, and 6 have become rare members, some have been eliminated from the battery family due to being eliminated from the market. Below, we will introduce these unfamiliar battery models separately.

The No. 3 battery was once an easily available battery on the market, and it was even thicker than a regular No. 5 battery. Generally used as battery cells in battery packs, they are mostly used in power tools (such as hand drills, sweepers, vacuum cleaners), cameras, and some imported equipment. With the development of technology, these electric tools are no longer powered by dry batteries.

The No. 4 battery is a cylindrical battery with IEC specification R10, usually used as the battery cell in the battery pack, such as nickel chromium and nickel hydrogen batteries for old-fashioned cameras. However, in recent years, with the upgrading of these devices, they have gradually been phased out of the market.

The No. 6 battery is suitable for the battery cells in the battery, so it is rarely seen in daily life.

Next time someone asks the question "why only batteries 1, 5, and 7 are available, but not batteries 4, 8, and 9", it's your turn to introduce the members of the dry battery family to them!

Storage techniques for dry batteries. Unneeded dry batteries can be removed and stored in a cool and dry place. When storing, a thin layer of candle oil can be applied to the negative electrode of the battery to prevent leakage. Dry batteries can also be stored in the refrigerator freezer to avoid running out of battery, but be careful not to come into contact with food.Storage methods for lithium batteries. Lithium batteries that are not used for a long time should be charged with 50% to 80% of their capacity first, and then taken out of the instrument and placed in a dry environment. The battery should be charged every three months to avoid excessive storage time and irreversible capacity loss caused by self discharge.

Disposal of waste batteries. Ordinary dry batteries can be directly thrown into the recyclable garbage bin, and there will be dedicated personnel to sort and recycle them. However, the substances contained in rechargeable batteries are relatively complex and pose significant harm to the environment and human health. They should be sent to a professional waste battery recycling agency for treatment, or the local environmental protection bureau can be contacted for recycling.

Article source: Manufacturing Principles