BUY RTC-4513 https://www.utsource.net/itm/p/5844206.html
Real time clock module(SERIAL-INTERFACE REAL TIME CLOCK MODULE)
Description: The RTC-4513 is a Real-Time Clock (RTC) IC manufactured by Raltron Electronics Corporation. It is a low-power, low-cost, and highly accurate device that is used to keep track of time and date in a variety of applications. Features: - Low power consumption - Low cost - High accuracy - Operating voltage range of 2.2V to 5.5V - Operating temperature range of -40°C to +85°C - I2C interface - Programmable alarm - Battery backup Applications: The RTC-4513 is used in a variety of applications including: - Automotive systems - Industrial control systems - Home automation systems - Wearable devices - Smart home appliances - Smart meters - Medical devices - Security systems (For reference only)