Seeed 101020013 Grove - RTC(DS1307) is based on the clock chip DS1307 and supports I2C communication. It uses a Lithium cell battery (CR1225) as it is low cost and very energy efficient. It can run for years on a very small coin cell. * Complete functionality: Real-time clock (RTC) counts seconds, minutes, hours, date of the month, month, day of the week, and year with leap-year compensation valid up to 2100. * Power detection: Automatic power-fail detect and switch circuitry. * Longevity: Consumes less than 500nA in battery backup mode with oscillator running * Grove unified socket: The product ensures "Plug and Play" and could be versatile for various applications. * Dimensions: 130mm x80mm x10mm * Weight: G.W 10g * Battery: Excluded * PCB Size: 2.0cm*4.0cm * IO Structure: SCL,SDA,VCC,GND * ROHS: YES * VCC: 3.3~5.5V * Logic High Level Input: 2.2~VCC+0.3 V * Logic Low Level Input: -0.3~+0.8 V * Battery Voltage: 2.0~3.5 V https://elecena.pl/product/27185570/seeed-101020013-grove-rtc-ds1307 2024-11-08 https://elecena.pl/product/27185570/seeed-101020013-grove-rtc-ds1307 2025-04-01 https://elecena.pl/product/27185570/seeed-101020013-grove-rtc-ds1307 2025-04-30 https://elecena.pl/product/27185570/seeed-101020013-grove-rtc-ds1307 2025-06-04 https://elecena.pl/product/27185570/seeed-101020013-grove-rtc-ds1307 2025-07-13 https://elecena.pl/product/27185570/seeed-101020013-grove-rtc-ds1307 2025-08-02 https://elecena.pl/product/27185570/seeed-101020013-grove-rtc-ds1307 2025-09-12