What is the difference between 18650, 21700 and 20700 batteries?

Batteries of different sizes play an important role in electronic devices. This article will discuss the differences between 18650 batteries, 21700 batteries, and 20700 batteries to help consumers make informed decisions when choosing batteries.

First of all, looking at the size, the diameter of the 18650 battery is about 18mm and the length is about 65mm. The size of the 21700 battery is slightly larger, about 21mm in diameter and 70mm in length. The size of the 20700 battery is somewhere in between, about 20mm diameter and 70mm length. So, the 18650 battery is the smallest, the 21700 battery is the largest, and the 20700 battery is somewhere in between.

Secondly, in terms of charge capacity, 21700 batteries usually have the highest capacity, followed by 20700 batteries, while 18650 batteries have a relatively lower capacity. A higher charge capacity means the battery can store more energy, providing longer use. Therefore, 21700 and 20700 batteries perform better in high energy consumption devices, while 18650 batteries are suitable for low power consumption devices.

Additionally, power output is also an important difference between these batteries. 21700 cells generally provide the highest power output due to their larger size and higher charge capacity. The power output of the 20700 battery is slightly lower than that of the 21700 battery, while the power output of the 18650 battery is relatively low.

The consistency of the operating voltage also needs to be taken into consideration. The operating voltage of 18650, 21700 and 20700 batteries is usually 3.7 volts (the standard voltage of lithium-ion batteries). Therefore, when selecting a battery, you need to ensure that the operating voltage required by the device matches the battery type.

Finally, something to note is compatibility. Due to size differences, these batteries cannot be used interchangeably. Devices are often designed to work with a specific type of battery, so before purchasing a battery, you need to make sure you select a battery type that is compatible with your device.

To summarize, there are differences in size, charge capacity, and power output between 18650, 21700, and 20700 batteries. The 21700 battery has the largest size and highest charge capacity and power output for high energy consumption devices. The 20700 battery is between the 21700 and 18650 in size and performance. The 18650 battery has the smallest size, lower charge capacity and power output, and is suitable for low-power devices. When purchasing batteries, consumers should choose the appropriate battery type based on their device needs and personal preferences.

Jiangmen Hongli Energy Co., Ltd. is a national high-tech enterprise and a professional manufacturer of 3V primary Lithium Batteries. The company's products include 3V Lithium Manganese Battery, 6-9V Lithium Manganese Battery, Medical Equipment Battery, Smoke Detector Battery, Flashlight Battery and 3V Botton Battery...