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Not a big deal. "a few parts per thousand". This paper only states that the memory effect is there in a tiny amount if you look hard enough for it but in practical terms, it is still a non issue.
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Partial charge/ discharge use is proven to prolong useful life of these cells. You have to stay away from the last 7% on either end.
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NanoTech LiFePo4 batteries such as the A123 AMP20 pouch cells are great batteries if you don't need huge discharge rates with an easy reach to 3,000 80% cycles. It will be a long time before anything significantly better comes along.
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