¶ RTC Battery
RTC (Real Time Clock) is an independent timer used to provide system time. It can continue operating when the system is powered off or in low-power mode, requiring only a backup battery as its power source.
RTC Battery Connector: 2-Pin, with a pitch of 1.25mm
The voltage of the RTC battery for K1 is 3.3V, which is consistent with the operating voltage of the RTC chip, and its power consumption is approximately 35mAh per year.