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Leif (not verified)    April 12, 2021 - 12:57PM

This is exciting news. My '09 GenII has over 260,000 miles and while it is indeed old, I see no compelling reason to replace it. I've long believed that Toyota's BMS is both conservative and comprehensive, which is why so many Prii are running around with their original batteries. I have to assume that the Li-Ion pack's builders have taken the existing BMS' behavior into account so their batts play well with Toyota's brain.

I'm averaging about 49.6 MPG right now, shedding a few pounds and adding more EV capacity for the in-town driving my wife does could only improve matters.

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