I am considering replacing the coin battery in my shield design with a super capacitor. I wonder if someone else is doing this already. Any comments/suggestions? I'm using DS1307. It has a maximal I_battery of 500nA, maximal V_batt 3.5V. I intend to use the Arduino 3.3V supply to charge it to 3.3V.…

Super capacitor to replace RTC coin battery?

JChristensen May 13, 2012, 2:52am 16

Some RTCs have built-in battery charging circuits, perhaps a super capacitor can be substituted.

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