Lithium ion battery is divided into lithium cobalt acid, lithium ferrate phosphate, ternary. The batteries of the three material systems have different advantages. The batteries are widely used in laptop computers, digital cameras, lighting fixtures, toy products, power tools, portable energy and other fields. Here is a brief introduction to the following models and specifications.

14500 battery is a kind of lithium ion battery with a diameter of 14mm and a height of 50mm, which is also the specification size of the battery we have always called No.5 battery. This battery is generally 3.7V or 3.2V, with a relatively small nominal capacity, larger than 10440 battery, generally 1600mAh, with superior discharge performance. The most important application areas are consumer electronics, such as wireless audio, electric toys, digital cameras and so on.

16340 battery is a diameter of 16mm, the height of 34mm lithium ion battery, this battery because the ruler height is a little short, and the capacity is not very small, so in strong light flashlight, LED flashlight, headlamp, laser lamp, lighting fixtures often appear.

18650 battery is a kind of lithium ion battery with a diameter of 18mm and a height of 65mm. Its biggest characteristic is that it has a very high energy density, almost 170 watt-hours/kg. Therefore, this kind of battery has a good cost performance ratio. All aspects of the system quality stability is good, widely applicable to about 10 KWH battery capacity occasions, such as in mobile phones, laptops and other small electrical appliances.

21700 battery is a kind of lithium ion battery with a diameter of 21mm and a height of 70mm. Because its volume increases and space utilization increases, the energy density of the cell and the system can be improved. Its volume energy density is much higher than that of 18650 battery, which is widely used in digital. Electric vehicles, balance vehicles, solar energy lithium ion battery street lights, LED lights, power tools, etc.