An electrolytic capacitor is a type of capacitor that stores electrical energy using an electrolyte, which is a conductive liquid or gel. These capacitors are polarized, meaning they have a positive and a negative terminal, and they are commonly used in electronic circuits to filter, smooth, or store energy. They are known for their high capacitance values, making them suitable for applications like power supply filtering. Typically, electrolytic capacitors are found in devices such as power supplies, audio equipment, and computers. They can handle significant voltage levels but must be connected correctly to avoid damage. Their compact size and efficiency make them essential components in modern electronics.