Types of 18650 batteries.
18650 batteries have multiple chemical compositions, each suitable for different usage needs. At Keheng, we focus on understanding your device requirements in order to choose the most suitable battery type.

Lithium ion (Li ion): The most common type with high capacity and long-lasting power, suitable for high power consuming applications and reliable charging.
Lithium iron phosphate (LiFePO4): Although typically lower in capacity, they are one of the safer choices.
Lithium manganese oxide (IMR): They are known for their safety and high yield, but their lifespan may not be as long as other chemicals.
Protected and Unprotected: The 18650 battery with protection function has a built-in circuit that can prevent overcharging, overheating, and short circuits, thereby enhancing safety. Unprotected batteries may pose higher risks due to the lack of safety circuits, but they are more suitable for high power consumption applications that require maximum current output.
The choice depends on the most important factors - safety, lifespan, or raw power output.