RTC 10 Click Mikroe RTC 10 Click is a real-time clock module with extremely low power consumption. The Mikroe click is ideal for use with a single-button cell battery for an extended period. The RTC 10 features the Maxim Integrated DS3231M low-cost, extremely accurate, I2C real-time clock (RTC). The device incorporates a battery input and maintains accurate timekeeping when the main power to the device is interrupted. Integrating the microelectromechanical systems (MEMS) resonator enhances the long-term accuracy of the device and reduces the piece-part count in a manufacturing line.