Can capacitors store energy even after the power has been removed from the circuit?

Capacitors are capable of storing electrical energy in the form of an electrostatic field, which allows them to retain some charge even after power has been removed from the circuit. Once charged, they can hold this energy for a duration, determined by the capacitor's characteristics and the circuit configuration. In ideal conditions, a fully charged capacitor can discharge its stored energy over a prolonged period, providing it has no significant leakage path or load connected to it.

The longevity of energy storage depends on the capacitor's type, size, and the surrounding environment, such as temperature and humidity. However, it's important to note that while capacitors can indeed store charge for some time, they do not retain energy indefinitely. Ultimately, they will gradually discharge due to internal leakage and other factors, but the notion that they can store energy for a considerable time post-power removal is accurate.