What is the difference between 18650 battery and 21700 battery?

2024 01/10

In the rechargeable battery market, 18650 batteries and 21700 batteries are two common options. This article will explore the differences between these two batteries to help consumers understand their characteristics and applicable scenarios.

First of all, in terms of size, the "18650" in the name of the 18650 battery refers to the size of the battery, which is about 18mm in diameter and 65mm in length. The "21700" in the name of the 21700 battery indicates its size, with a diameter of approximately 21mm and a length of approximately 70mm. Because the 21700 battery is larger and can hold more material and charge, it has higher capacity and power output potential.

Secondly, charge capacity is an important difference between these two types of batteries. 18650 batteries typically have a lower charge capacity, around 2000-3500mAh. The 21700 battery has a higher charge capacity, between 3000-5000mAh. The higher charge capacity means that the 21700 battery can store more energy, thereby extending the use time of the device and reducing the number of recharges.

Additionally, power output is also one of the differences between these two batteries. 21700 batteries generally have higher power output capabilities, mainly due to their larger size and higher charge capacity. As power demand increases, 21700 batteries are more suitable for high-power equipment such as power tools and electric vehicles. The 18650 battery is relatively suitable for low-power devices, such as handheld appliances and flashlights.

Something else to consider is compatibility. Due to size differences, 18650 batteries and 21700 batteries cannot be used directly interchangeably. Devices are usually designed to work with a specific type of battery. Therefore, before purchasing a battery, you need to make sure that you choose a battery type that is compatible with your device.

Finally, something to note is the price factor. Due to the larger size and higher performance of the 21700 battery, its price is usually higher. And 18650 batteries are generally cheaper due to their smaller size and lower performance. Therefore, consumers also need to consider their budget when choosing batteries.

To sum up, there is a clear difference between the 18650 battery and the 21700 battery. 21700 batteries have advantages in durability and serviceability due to their larger size, higher charge capacity and power output. The 18650 battery is relatively smaller and has lower capacity, making it more suitable for low-power devices. When purchasing batteries, consumers should consider factors such as device needs, performance requirements, and budget to choose the battery type that suits them.

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...