AA, AAA are respectively a kind of battery model, daily corresponding to the number 5 and 7 of the battery model, the global common standard is usually by letter to distinguish the battery model, such as D battery corresponding to the number 1, C battery corresponding to the number 2, AA corresponding to the number 5, AAA corresponding to the number 7.
For example:
AA is what we usually call the No. 5 battery, the general size: 14mm in diameter, 49mm in height;
AAA is what we usually call the No. 7 battery, the general size: 11mm in diameter, 44mm in height.
There is also a model number, is five digits, for example, 14500, 17490, 26500, the first two digits refers to the pool body diameter, the last three digits refers to the pool body high, for example, 14500 is the AA battery, that is, about 14mm diameter, 50mm high
Battery knowledge of a number of:
Talk about the common "AAAA, AAA, AA, A, SC, C, D, N, F" these models
AAAA model is rare, disposable AAAA alkaline batteries can occasionally be seen, generally used inside the computer pen. Standard AAAA (flat head) battery height 41.5 ± 0.5mm, diameter 8.1 ± 0.2mm.
AAA type battery is more common, the general remote control, electronic scales are used AAA batteries, the standard AAA (flat) battery height 43.6 ± 0.5mm, diameter 10.1 ± 0.2mm.
AA model battery is more well-known, digital cameras, electric toys are less AA batteries, the standard AA (flat) battery height 48.0 ± 0.5mm, diameter 14.1 ± 0.2mm.
Only one A indicates that the type of battery is not common, this series is usually used as a battery pack inside the battery cell, the old camera's built-in NiCd, NiMH batteries, almost all 4/5A, or 4/5SC battery cells. Standard A (flat head) battery height 49.0 ± 0.5mm, diameter 16.8 ± 0.2mm.
SC model is also uncommon, generally is the battery pack inside the battery cell, mostly in power tools and cameras and imported equipment can be seen, the standard SC (flat head) battery height 42.0 ± 0.5mm, diameter 22.1 ± 0.2mm.
C type is also the second battery, a lot of uses, the standard C (flat) battery height 49.5 ± 0.5mm, diameter 25.3 ± 0.2mm.
D model is the first battery, a wide range of uses, civilian, military, special DC power can be found in the D battery, the standard D (flat) battery height 59.0 ± 0.5mm, diameter 32.3 ± 0.2mm.
N type is not common, the standard N (flat) battery height 28.5 ± 0.5mm, diameter 11.7 ± 0.2mm.
F type batteries are generally used as battery cells in the battery pack, rarely used alone. The standard F (flat) battery height 89.0±0.5mm, diameter 32.3±0.2mm.
We note that the word (flat head) refers to the battery is flat, no protrusion, the use of battery cells used to do battery pack spot welding, generally the same model pointed (can be used as a single battery power supply), in the height of more than 0.5 mm. and so on, I will not explain one by one. Also, many times the battery is not the regular "AAA, AA, A, SC, C, D, N, F" these main models, the front also often have a score "1/3, 2/3, 1/2, 2/3, 4/5, 5/4, 7/5" These fractions indicate the corresponding height of the pool, for example, "2/3AA" means that the high is generally 2/3 of the AA battery rechargeable battery; and then "4/5A" means that the high is generally 4/5 of the A battery rechargeable battery.
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