It is used for real-time clock applications and time-oriented memory purposes. With this module, you can make a clock application with Arduino.
Since it is powered by the battery placed on it, it continues to work even if the main system runs out of energy.
Product It comes with a battery, but use this battery only during the testing and development phase. If you are going to install the product in a new location, we recommend that you install a new battery
The name of the battery on the board is CR2032. It is a frequently used and easily found battery.
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