AAA Battery protection box

AAA batteries, is a United States standards of battery, County 7th battery or Taiwan the 4th battery standard compatible. Cell is cylindrical, high 43.6 mm, ø 10.1 mm. Is a common cell, smaller than a AA battery. Commonly used in small, not too high power consumption electronic products such as MP3 players, mini remote control and so on. Disposable alkaline batteries or rechargeable nickel-metal hydride and lithium-ion batteries.
Technical standards
Batteries can be divided into: 1, 2, 3, 5, 7th, 5th, and 7th are especially common.
So-called AA batteries is the 5th battery, and is the 7th battery AAA battery! AA, AAA is description battery type.
Dimensions
AA is what we usually call the 5th battery, General dimensions: diameter: 14mm, 49mm;
AAA is what we usually call the 7th battery, General dimensions: diameter: 11mm, 44mm.
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