shipping without the battery!!!!
DS1307 I2C real-time clock chip (RTC)
24C32 32K I2C EEPROM the memory
using LIR2032 rechargeable lithium battery with charging circuit to
solve the DS1307 with backup battery can not read and write.
Fully charged, it can provide the DS1307 timing 1.
Compact design, 27mm * 28mm * 8.4mm
leads a DS1307 clock pin, to provide the clock signal for the microcontroller.
Can be cascaded to other I2C devices.
