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    MCU/FSD Upgrade, 12V Battery Dying Repeatedly in 2017 Model X

    Interestingly, I upgraded the MCU and FSD computer in my March 2017 Model X 100D on Thursday, August 13th. One week later, on Thursday, August 20th, I received an alert that the 12V battery needed to be replaced. I had the battery replaced on Friday, August 28th. No TeslaFi here, just...