Aluminum - Polymer CapacitorsAluminum-polymer capacitors are a type of electrolytic capacitor that uses an aluminum electrode and a polymer electrolyte to store electrical charge. These capacitors are commonly used in applications that require a high capacitance and a small form factor, such as portable electronic devices and wireless communication systems. Aluminum-polymer capacitors are known for their low equivalent series resistance (ESR), which makes them well-suited for high-frequency applications. They are also relatively resistant to damage from overvoltage and overcurrent, making them a popular choice in applications where the capacitor may be subjected to harsh conditions.