I started my LFP usage about 5 years ago when I bought 8 cells of 72 Axhr capacity used cells from a terminated DOE
project on Ebay. They were K2 cells, but didn’t have any
record of how many cycles they had been put through or cycle hi and lo limits. In the last year 2 of the 8 cells failed. I’ma
liveaboard so my batteries are cycled every day. Six months ago I bought 12 100Axhr cells of unknown provenence, at an extremely attractive
price essentially equal to lead acid. So far, so good. I’m not on my
boat for another 3 weeks or so (just had surgery) but can look up the paperwork when I get back.
As far as I’m concerned, my arthritic spine demands that I no longer use lead acid batteries, but I’m waiting for my start
battery to die before I’m free of all that awful weight just waiting to injure yet another failing body part: