18650 battery is a general term for a type of battery, now mostly referring to 18650 lithium batteries. 18650 refers to the battery's external dimensions, where 18 indicates a diameter of 18mm, 65 indicates a length of 65mm, and 0 indicates a cylindrical battery.
18650 power batteries generally have a capacity about half that of ordinary batteries. It's estimated that the capacity will not exceed 2000mAh, and is typically between 1000mAh and 1800mAh.
Generally, the operating voltage of a power battery is lower than that of a regular lithium battery. The maximum charging voltage of a regular lithium battery is 4.2V, while the maximum charging voltage of a power lithium battery is around 3.65V. The nominal voltage of a regular lithium battery is 3.7V, while the nominal voltage of a power lithium battery is 3.2V.
18650 power batteries support high-current discharge, potentially reaching 20 times their capacity, while ordinary 18650 lithium batteries only support 1 times their capacity discharge. That is to say, a typical 2600mAh battery has a maximum discharge current of 2600mA.
What is the difference between 18650 power lithium batteries and ordinary 18650 lithium batteries?
1. The positive and negative electrode material particles of the 18650 power lithium battery are smaller than those of ordinary 18650 lithium batteries (increasing the surface area and accelerating the chemical reaction rate), and the separator material and electrolyte used have better conductivity.
2. The 18650 power lithium battery has more tabs at the positive and negative terminals than the ordinary 18650 lithium battery (to reduce the internal resistance of the tabs and meet the requirements of larger current).
3. 18650 power batteries support high-current discharge, potentially reaching 20 times the capacity current, while ordinary 18650 lithium batteries only support 1 times the capacity discharge.
4. The capacity of 18650 power batteries is generally about half that of ordinary 18650 lithium batteries.
5. The maximum charging voltage of a regular lithium battery is 4.2V, while the maximum charging voltage of a power lithium battery is around 3.65V. The nominal voltage of a regular lithium battery is 3.7V, and the nominal voltage of a power lithium battery is 3.2V. A "lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution.
