Coin battery for power supply and easy to assemble new coin battery.
DS3231 internal integration crystals circuit, less power consumption.The RTC module is specifically designed for Raspberry Pi. It communicated with Raspberry Pi through I2C Interface.
This module is suitable for the power to save time, record the data.Set a serial port, TTL convenient way online debugging
There is a Maxim DS1307 and CR1220 button cell on the board to keep the real time for a long time after the Raspberry Pi has it''s power down.
Instructions Link: http://wiki.52pi.com/index.php/BAT_RTC%28English%29

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 2 inch
Height : 1 inch
Length : 3 inch

Item Weight: 0.16 ounce (View shipping rates and policies)
Shipping Weight: 0.32 ounce (View shipping rates and policies)

ASIN : B00ZOXWHK4