It is generally divided into: No. 1.2.3.5.7, of which No. 5 and No. 7 are particularly commonly used. The so-called AA battery is No. 5 battery, and AAA battery is No. 7 battery.

　　D-type battery (large battery/LR20/AM1) diameter ф 34.2; Height 61.5mm

　　C-type battery (No.2 battery/LR14/AM2) diameter ф 26.2; Height 50.0mm

　　AA type battery (No. 5 battery/LR6/AM3) diameter ф 14.5; Height 50.5mm

　　AAA type battery (No. 7 battery/LR03/AM4) diameter ф 10.5; Height 44.5mm

　　AA/2 type battery (No. 8 battery LR1/AM5) diameter ф 11.0; Height 30.0mm

　　AAAA type battery (No. 9 battery/LR61/AM6) diameter ф 8.0; Height 39.5mm

　　AAAA/2 type battery (small size 9 battery/LR61/AM6) diameter ф 8.0; Height 28.0mm

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