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What's happening is is when you're changing the battery you're creating the problem that's going on on your CM monitor display which is...
Very common problem for a Gen 2 Prius. A capacitor is bad or is going bad. Read this thread. https://priuschat.com/index.php?posts/2293037
Only difference I see in the batteries is that the new battery measures 12.7 volts with multimeter vs the 12.4 volts for the old battery.
tinkertwain posted a new thread.
We returned after 10 days to find the battery of our 2008 Prius dead. I jump-started the car, but it died again the next day. I...