About rechargeable battery (AA and AAA)

Generally divided into: 1, 2, 3, 5, 7, of which 5 and 7 are particularly commonly used, the so-called AA battery is 5, and AAA battery is 7! Both AA and AAA indicate the battery model.

For example:

AA is what we call battery 5. The general size is 14mm in diameter and the height is 49mm;

AAA is what we call battery 7. The general size is 11mm in diameter and 44mm in height.

The following is from this site: supplemented by the NIMH battery Forum

Additional battery knowledge:

Common models such as "AAAA, AAA, AA, A, SC, c, d, n, F"

The AAAA model is rare, and the one-time AAAA hard alkaline battery can be seen occasionally. It is generally used in a computer pen. Standard AAAA (flat head) battery height 41.5 ± 0. 5mm, diameter 8.1 ± 0. 2mm.

Aaa-type battery is more common. Generally, MP3 uses AAA battery. The height of standard AAA (flat) battery is 43.6 ±0. 5mm in diameter and 10.1 ±0. 2mm in diameter.

AA type battery is even more widely known, digital cameras, electric toys are indispensable AA battery, standard AA (flat head) battery height 48.0 ± 0. 5mm, diameter 14.1 ± 0. 2mm.

Only one A indicates that the model of the battery is uncommon. This series is usually used as the battery core in the battery pack. I often change the old camera's nickel-cadmium and nickel-MH battery, almost all of which are 4/5A, or a 4/5sc cell. Standard A (flat head) battery height 49.0 ± 0. 5mm, diameter 16.8 ± 0. 2mm.

The SC Model is also uncommon. It is generally the battery core in the battery pack. It can be seen mostly in power tools, cameras, and imported equipment. The standard SC (flat head) battery height is 42.0 ± 0. 5mm, diameter 22.1 + 0. 2mm.

The C model is the No. 2 battery, which has many functions. The height of the Standard C (flat head) battery is 49.5 ± 0. 5mm in diameter and 25.3 ± 0. 2mm in diameter.

D is the first battery, widely used, civil, military, special shaped DC power supply can find D type battery, standard D (flat head) battery height 59.0 ± 0. 5mm, diameter 32.3 + 0. 2mm.

N models are not common. I still don't know what to use in it. The standard N (flat) battery height is 28.5 ± 0. 5mm, and the diameter is 11.7 ± 0. 2mm.

F-type battery, now a new generation of power battery products, there is a trend to replace lead-acid maintenance-free battery, generally used as the battery core (personal opinion: in fact, it is too big, it is not easy to use independently, haha ). Standard N (flat head) battery height 89.0 ± 0. 5mm, diameter 32.3 ± 0. 2mm.

We have noticed that the positive electrode of the battery is flat and has no protruding points. The battery Cores Used for battery spot welding are used, generally, the head of the same model (which can be used as a single battery power supply) has an additional 0.5mm in height. And so on, I will not explain them one by one. In addition, many battery models such as AAA, AA, A, SC, c, d, n, and F are not well-behaved. The front of the battery often has a score of "1/3, 2/3, 1/2, 2/3, 4/5, 5/4, 7/5 ". These scores indicate the height of the pool, for example, "2/3AA" indicates that the high is the 2/3 rechargeable battery of the general AA battery, and "4/5A" indicates that the high is the 4/5 rechargeable battery of the general a battery.

There is also a model representation method, which is a five-digit number, for example, 14500,17490, 26500. The first two digits refer to the diameter of the pool body, and the last three digits refer to the height of the pool body, for example, 14500 is an AA battery, which is about 14mm in diameter and 50mm High.
References:Http://www.ni-mh.cn/faq/index.htm

Differences between carbon and Alkaline Battery

Alkaline Battery is 4-5 times the power of carbon battery, and the price is 1.5-2 times of carbon. Carbon batteries are suitable for low-current electrical appliances, such as quartzels, remote control, and radios. Alkaline batteries are applicable to high-current electrical appliances, such as BPPS, CD, and handheld computers.