Quote:
Originally Posted by HarryT
Lithium battery lifetime has two factors:
1. The number of charge cycles, as above.
2. A absolute lifespan somewhere around 5 years which is independent of the number of charge cycles. The clock starts ticking when the battery is first charged, and can't be stopped.
The second of these factors, not the first, is what will eventually kill the battery of any reader.
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I agree with your conclusion that your factor (2) will be the dominant one, but the technical pedant in me feels the need to point out that there are several other factors affecting LiIon battery lifetime, not just the two you point out.
As you say, though - it doesn't really matter. I can't envisage charge-cycle-related battery lifetime issues actually causing a noticeable problem in real life.