What's the difference between AA battery and AAA battery?

Size. The seventh battery is relatively small, generally used in relatively portable machines. The disadvantage is that the capacity is too small and can only reach 1/4 of the same brand of No. 5 battery. The 5th battery is relatively large, which is used in the tape player and camera. The machine above has more electricity. On the 7th battery, there will be "AAA" on the fifth battery. The above is "AA". If you look carefully, you will find it.

Also, the No. 5 battery is about as thick as a finger, and the No. 7 battery is almost as thick as an ordinary pen.

size. The seventh battery is relatively small, generally used in relatively portable machines. The disadvantage is that the capacity is too small and can only reach 1/4 of the same brand of No. 5 battery. The 5th battery is relatively large, which is used in the tape player and camera. The machine above has more electricity. On the 7th battery, there will be "AAA" on the fifth battery. The above is "AA". If you look carefully, you will find it.

Also, the No. 5 battery is about as thick as a finger, and the No. 7 battery is almost as thick as an ordinary pen.

No. 5 battery: its general size is 14mm in diameter and 49mm in height.

Battery No. 7: The battery is cylindrical, 43.6 mm high and 10.1 mm in diameter.

Expanding information:

Battery means a space in a cup, tank or other container or composite container containing an electrolyte solution and a metal electrode to generate electrical current, a device capable of converting chemical energy into electrical energy. It has a positive electrode and a negative electrode.

First, the battery model

They are generally divided into: D.C.AA.AAA.AA/2, of which AA and AA are especially commonly used, the so-called AA battery is the 5th battery, and the AAA battery is the 7th battery.

D type battery (large battery / LR20 / AM1) diameter ф34.2; height 61.5mm

C type battery (2nd battery / LR14/AM2) diameter ф26.2; height 50.0mm

AA type battery (5th battery / LR6 / AM3) diameter ф14.5; height 50.5mm

AAA type battery (7th battery / LR03 / AM4) diameter ф10.5; height 44.5mm

AA/2 type battery (8th battery LR1/AM5) diameter ф11.0; height 30.0mm

AAAA type battery (9th battery / LR61/AM6) diameter ф8.0; height 39.5mm

AAAA/2 type battery (small 9th battery / LR61/AM6) diameter ф8.0; height 28.0mm

Second, battery knowledge

1. Normal charging

Different batteries have their own characteristics, and the user must charge according to the method indicated by the manufacturer's instructions. In the standby state, the phone also consumes the battery. If you want to charge quickly, you should turn off the phone or remove the battery to charge it.

2. Fast charging

Some automated smart quick chargers only indicate that they are full 90% when the indicator signal changes. The charger will automatically switch to slow charging to fully charge the battery. It is best for the user to fully charge the battery before use, otherwise it will shorten the use time.

3. Memory effect

If the battery is a nickel-cadmium battery, it will not be completely charged and discharged for a long time, which will leave marks in the battery and reduce the battery capacity. This phenomenon is called battery memory effect.

Third, buy batteries

1. Purchase battery products with “National Exemption” and “China Famous Brand” logos and local brand-name battery products. The quality of these products is guaranteed.

2. According to the requirements of the electrical appliance, select the applicable battery type and size, and purchase the battery suitable for the electrical appliance according to the size and characteristics of the electrical power consumption.

3, pay attention to check the battery production date and shelf life, buy batteries (new batteries), the new battery performance is good.

4, pay attention to check the appearance of the battery, you should choose a battery that is exquisitely packaged, neat and clean, and has no signs of leakage.

5, pay attention to the battery logo, the battery trademark should be marked with the name of the manufacturer, battery polarity, battery model, nominal voltage, trademark, etc.; on the sale packaging.

Fourth, waste battery treatment methods:

There are three types of waste batteries that are commonly used in the world: solidified and buried, stored in waste mines, and recycled.

1. Solidified and buried in waste mine

2. Recycle and re-use

(1) Heat treatment

(2) "Wet treatment"

(3) Vacuum heat treatment