How to distinguish the size of the battery
Different types and brands of dry batteries have very different capacities.
The 5th zinc dry battery may only have about 500mAH, while the good quality 5th alkaline battery may have about 2000mAH.
Disposable batteries generally do not have a nominal battery capacity, but rechargeable ones will have a nominal capacity.
1. Comparison table of common battery models and sizes
Flat head means that the positive electrode of the battery is flat and has no protrusions. The battery cell used for spot welding of the battery pack is used. Generally, the same type of pointed head (can be used as a single battery power supply) is 0.5mm more in height. . By analogy, I will not explain them one by one. In addition, when there are many batteries, it is not the main models of "AAA, AA, A, SC, C, D, N, F", and there are often scores in front of "1/3, 2/3, 1/ 2, 2/3, 4/5, 5/4, 7/5", these scores represent the corresponding height of the cell body, for example, "2/3AA" means a rechargeable battery whose height is 2/3 of that of an ordinary AA battery ; Another example is "4/5A" which means a rechargeable battery whose height is 4/5 of that of an ordinary A battery.
Introduction of common battery models and sizes
2. Lithium-ion battery cell model and size
(1) Cylindrical lithium-ion battery cell: usually represented by five digits, the first two digits refer to the diameter of the cell body, and the last three digits refer to the height of the cell body. For example, 14500 refers to AA batteries, that is, about 14mm in diameter and 50mm in height . Common models: 14500, 14650, 17490, 18500, 18650, 26500.
Common BAK and Sanyo cylindrical battery specifications and models:
BAK 186502200mAh3.7V, BAK 186502600mAh3.7V, BAK 186502000mAh3.6V ternary long life
Sanyo 186502100mAh3.7V, Sanyo 186502500mAh3.7V, Sanyo 186501500mAh3.7V18650
