Ds1307 with lir2032 battery

[DaveX]

Tiny RTC Charging Circuit Schematic

Gentlemen, I am trying to use this cheap RTC DS1307 module (Tiny RTC) for a clock project using Arduino. I want to use a CR2032 back-up battery. By doing some research, I found a schematic diagram. The included schematic shows a charging circuit connected to the back-up power which requires a rechargeable back-up battery. The note in the schematic requires that to be able to use the CR2032 non rechargeable battery, a circuit modification must be done that includes the removal of several …