Originally posted by TheLurch
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If there's a formula, that'd be bonus. I grok formulae just fine.
But now that you highlight that graph, the red vs. blue lines does really drive home the relationship between battery performance and how much you stray from intermediate discharge states.
C is simply a measure of how fast you charge it. C/3 is a pretty slow charge; 1C is what would be considered a normal charging rate for a battery of this size. Batteries tend to perform better if you charge them more slowly, as the ions have more time to integrate into the electrode in an orderly way.
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