Quote:
Originally Posted by davidfor
Which is a great suggestion. Except that it means you can't actually use the battery for what it is meant for, to run something independent of a wired power source. I mean, if you follow that suggestion, it means you are keeping the battery between 40% and 60% charge which means you are only using about a fifth of the possible runtime. Which basically means you are maintaining the long-term health of the battery so that you don't use it.
Stop worrying, just use the battery as you need to. Anything you do to extend the overall life of Li-Ion basically means you don't actually use it, have to actually work at it, and doesn't necessarily give much benefit.
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Of course you should not be afraid to sometimes charge it to 100%. I do that as well. I just say that it is really bad for the battery chemistry to stay constantly, or at a majority of the time, between 90-100% SoC.
This is not unique for e-readers. It is often the same with computers, phones and BEV. One should for most common batteries not have them charged att 100% for prolonged time. That will often degrade the battry capacity of your phone or laptop (or car or e-reader) rapidly.