1.The DS1307 I2C Real Time Clock chips (RTC)
2.I2C EEPROM Memory 24C32 32K
3.Adopt LIR2032 rechargeable lithium battery， with the charging circuit
4.Solved the problem of DS1307 with battery backup can not read and write.
5.Fully charged， can provide the DS1307 timing for 1 year .
6.Compact design， 27mm * 28mm * 8.4mm
7.Lead off clock pin of DS1307  to provide clock signal for MCU .
8.Can be cascaded to other I2C devices