What is 18650 lithium battery? How to choose high-quality lithium batteries?

What is 18650 lithium battery? How to choose high-quality lithium batteries?

18650 lithium battery, a standardized lithium-ion battery model developed by Japanese company SONY to reduce production costs. The 18 in its name represents a battery diameter of 18mm, 65 represents a length of 65mm, and the final 0 indicates that it is a cylindrical battery, making it a pioneer in lithium-ion batteries. Let's continue to delve deeper into this battery.

In the market, we can see various types of 18650 batteries, mainly including lithium-ion batteries, lithium iron phosphate batteries, and ternary lithium batteries. According to their different top shapes, they can also be divided into two categories: flat head and pointed head. Flat head batteries do not have protective covers, while pointed head batteries come with a protective cover to prevent overcharging. 18650 lithium batteries are mainly used in the industrial field and are not equipped with protective covers to save costs. However, special care should be taken during use to avoid battery damage. To protect the battery, a protective circuit is usually added to the 18650 lithium battery.

When we need to purchase high-quality 18650 lithium batteries, there are a few special points to pay attention to:
1. Choose top brand battery cells to ensure superior quality of the battery.
2. Select batteries equipped with multifunctional protection circuit boards, including overcharge, overdischarge, overcurrent, short circuit, temperature, internal resistance, and power consumption protection.
In addition to the above two points, we also need to consider the following factors when making a purchase:
-Brand awareness and reputation
-The capacity and voltage of the battery
-Continuous discharge capability and chemical properties of batteries
-Expected lifespan and safety of batteries

In summary, when choosing 18650 lithium batteries, the most important thing is to find the product that best meets your needs and budget.