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The I2C pullup resistors have been switched from 3.3k to 4.7k since this is a more common value for I2C and in the E3 series. I am using this resistor since it is already in the WARG Altium library. RC0402FR-074K7L YAGEO | Resistors | DigiKey
Low battery indicator
Removed this and connected the voltage sense to the MCU.
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