14500 vs 18650 battery, what is the difference?

14500 vs 18650 battery, they are the same type of lithium batteries, both are indicated by the model number of the battery size. 14500 indicates that the diameter of 14mm length of 50mm cylindrical batteries, its size and the usual size of the 5 battery size is the same; 18650 battery is a diameter of 18mm length of 65mm cylindrical batteries, this specification of batteries is also very commonly used in many applications and solar battery manufacturers assembly.

Battery Introduction:

Battery refers to the cup, tank or other container or part of the space of the composite container containing electrolyte solution and metal electrodes to generate current, and can convert chemical energy into electrical energy device. There are positive and negative electrodes. With the progress of science and technology, the battery refers to a small device that can produce electrical energy. Such as solar cells. Battery performance parameters are mainly electric potential, capacity, specific energy and resistance. The use of batteries as energy supply, you can get a stable voltage, stable current, stable power supply for a long time, by the outside world has very little impact on the current, and the battery structure is simple, easy to carry, easy to charge and discharge, not subject to the influence of external climate and temperature, stable and reliable performance,  play a great role in the all aspects of modern society.

14500 vs 18650 battery Specific presentation:

These two specifications of the battery according to the different types of batteries will also have different specifications parameters, common LiFePO4 batteries and lithium-ion batteries. The rated voltage of the lithium iron phosphate battery is 3.2V and the saturation voltage is 3.6V, 3v battery; the rated voltage of the lithium ion battery is 3.7V and the saturation voltage is 4.2V. 

Due to the small size of 14500 battery,  its capacity will also be relatively small, the conventional capacity is generally between 600mAh-800mAh, the largest capacity is generally not more than 900mAh, so the questioner gave the battery capacity of 500mAh is not too small capacity. Only batteries that cost too little may have inflated capacity or be secondary batteries.

What is 14500 Battery?

The diameter of 14500 battery is 14mm, the height is 50mm lithium battery, according to the cell material is divided into lithium iron phosphate and lithium cobalt acid battery. Lithium cobalt acid battery voltage of 3.7V, lithium iron phosphate battery voltage of 3.2V, through the lithium battery regulator can be adjusted to 3.0V. Because of its external dimensions and AA 5 # battery the same, a 14500 lithium battery and a placeholder barrel with, can replace the use of two AA batteries. Compared with NiMH rechargeable batteries, Li-ion batteries have the advantages of light weight, low self-discharge, and superior discharge performance, so they are widely used by photography enthusiasts in digital cameras and electronic cigarettes to replace NiMH rechargeable batteries.

What is 18650 Battery?

18650 lithium battery is more commonly used in electronic products, often used in the laptop computer battery as a battery cell. The definition of its model law is: such as 18650 type, that is, the diameter of the battery is 18mm, the length of 65mm, cylinder type battery. Lithium is a metal element, why do we call him lithium battery? Because its positive pole is “lithium cobalt” as the positive material of the battery, of course, there are many batteries on the market now, lithium iron phosphate, lithium manganate and other positive materials for the battery. 12v lithium battery could be assembled from 18650 batteries.

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