My intention with the circuit below is to enable a DS1337+ (I2C, 8-DIP, RTC by Maxim) to have a battery backup, just like the DS1307. The DS1337+ (and DS1672) is all I have in hads right now, so suggestions such as "just use a DS1307" aren't exactly what I am looking for. I already have all the com…

Feeding DS1337 with Arduino +5V and having battery backup

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