There are two basic methods for naming lithium battery, one is from the positive material of lithium battery, the other is from the size. These two basic classifications start from the common aspects and have general characteristics. In addition, there is a classification from a certain performance or application, which starts from the aspect of personality and has specific characteristics. The 26650 lithium battery is classified in terms of size, so it has a common shape. Its cathode material, performance and application fields are diversified.

26650, which is strictly defined as the size of single electric core: diameter 26mm, height 65mm. The dimensions of this cylinder are slightly different from each manufacturer in the actual production. The so-called "tall, short, fat and thin" are different, all called 26650. But this difference will not be very big, the diameter will not exceed 27mm, and the height will not exceed 66mm. When a single cell is put into use with a support system, it is a 26650 lithium battery. If it is a combination of multiple lithium cells or lithium batteries, it is called a lithium battery pack. To be more precise, it is a 26650 lithium battery pack.

Like 18650 lithium battery, 26650 lithium battery can also use different positive materials. According to the current market application, there are 26650 ternary lithium battery and 26650 lithium iron phosphate battery. The difference between them is also the general difference between the ternary lithium battery and lithium iron phosphate battery. The former has the advantages of high capacity and voltage platform, while the latter has the advantages of safety and high starting current. Combined with the fact that 26650 lithium batteries are mostly used in equipment startup, 26650 lithium iron phosphate batteries are the main application, and the advantages of these batteries in safety and price are obvious.

Many factories will produce 26650 lithium iron phosphate batteries. Although they are personalized, their basic parameters should meet international standards. Below we choose to customize the relevant parameters of Dongguan Juda Electronics Co., Ltd., a lithium battery manufacturer, to give you a general understanding of 26650 lithium batteries. The company's 26650 lithium battery dimensions: 26.4 * 65.8mm maximum, 3000mAh nominal capacity, 3.2V nominal voltage, 3.65v and 2.5V charging and discharging cut-off voltage, 1500mah standard charging and discharging current, 1c charging and 1.5C discharging maximum, operating temperature of - 10 ℃ ~ + 60 ℃.

The 26650 lithium iron phosphate battery has stable charging and discharging performance, high temperature resistance, and cycle life three times that of ternary materials. Because it can charge and discharge with large current, it is very suitable for flashlight, miner's lamp, instrument and so on. Moreover, this advantage enables it to develop to large scale. For example, the 26650 power lithium iron phosphate battery technology of General Electronics Technology Co., Ltd has been mature.