Aluminum capacitor components are used in a wide variety of applications. They are commonly used in power supply systems, and industrial motor assemblies. Compared to supercapacitors, they are a relatively inexpensive type of capacitor. Their capacitance and energy density are relatively high.

Aluminum electrolytic capacitors are also called V-chips. These capacitors are manufactured from anodized aluminum foil and sealed with rubber. The electrodes are separated by a thin layer of insulating oxide. They have a voltage rating from 5 Vdc to 700 Vdc.
Electrolytic aluminum capacitors are polarized. This means that the cathode is a positive and the anode is a negative. Most of the capacitors are based on the standard model with screw terminals on the bottom plate. However, there are special types of capacitors for photoflash applications.

The electrolyte in aluminum electrolytic capacitors is usually a liquid. However, some manufacturers use a solid solution. In addition, the electrolyte can evaporate over time. As a result, the capacity of the capacitor can be affected.

The size and shape of the aluminum capacitor components vary. Larger packages are often mounted vertically, while small devices are typically mounted with epoxy. Clamping devices are also often used.
The capacitance of an aluminum electrolytic capacitor decreases as the temperature increases. It can also be eroded by reversing the applied voltage. So, it's important to keep the polarization of the capacitor correct.

In addition, the number of stored charges will also depend on the type of insulator used. If the dielectric is a thicker type, the capacitance will be lower per volume.