1, AA is what we usually call the 5th battery; AAA is what we usually call the No.7 battery. So just look at the logo on the battery.
The general size of No.2.5 battery is 14mm, and 50mm is in height; The size of the 7th battery is generally 10mm in diameter and 44mm in height. So it is obvious that battery number five is obviously more powerful than battery number seven.
No.3 and No.5 batteries are small in size and moderate in capacity, and are widely used in many small electrical appliances and digital products. The 7th battery is often used in electronic products with small size and low power consumption, such as MP3 players and small remote controllers.
Buy a battery:
1. Buy battery products marked with "National Inspection Exemption" and "China Famous Brand" and local famous brand battery products. The quality of these products is guaranteed.
2, according to the requirements of electrical appliances, choose the appropriate battery type and size, and according to the size and characteristics of electrical power consumption, choose and buy batteries suitable for electrical appliances.
3. Pay attention to the production date and shelf life of the battery, and buy a battery (new battery) with good performance.
Refer to the above content: Baidu Encyclopedia-No.5 battery