To be clear, this has replaced your lead acid battery?
At 14.4v, it ought to be at 96% state of charge, with 14.6v being the maximum operating voltage. Aside from it being better to hold it at a slightly lower state of charge, a hybrid is pretty much in ideal use-case for one, assuming Toyota doesn't have any DC-DC behavior to improve the health of lead-acid batteries.
My experience has been that LiFePO4 will survive extreme winter conditions, especially if not being used for starting purposes. If charged below freezing, dendrites begin puncturing and destroying the insides of the battery, but LiFePO4 appears (anecdotally) to be able to survive a bit of this. In my Insight, I still chose to swap out for a lead acid during the months where the average temperature would be below freezing.
Out of curiosity, how much did it cost? Have any specs?
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