RTC (Real-Time Clock)

A Real-Time Clock (RTC) is a small electronic device in computers and electronic systems that keeps track of the current time and date, even when the device is turned off. It uses a battery to maintain its timekeeping function independently of the main power supply. This ensures that the system always has an accurate time reference for activities like logging events, scheduling tasks, or syncing with network time. Essentially, an RTC acts as a reliable clock that persists across power cycles, providing consistent time information for the device’s operation.