IIRC Boeing did not use LiFePO4, but instead a different Li chemistry. The ones they used had higher energy density, but were prone to thermal instability. As they discovered. There are a plethora of Li battery chemistries, and unfortunately they are lumped together for 'reporting' all too often.
I'm anticipating LiFePO4 systems suitable for boats at reasonable prices in a year or so, based on discussions with a friend who is intending to establish a business to do just that.
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Brian
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