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I am not a battery expert, but my understanding is that the most significant way that batteries degrade is through the heat production when charging near capaci

I am not a battery expert, but my understanding is that the most significant way that batteries degrade is through the heat production when charging near capacity (say 80-100%). This is why high end laptops like macbooks or thinkpads have battery management hardware/software that never automatically charges the battery to 100%. For instance, based on recommendations by TLP, my thinkpad internal battery only charges to 60% and external to 75%.

lloeki 8y ago
> This is why high end laptops like macbooks or thinkpads have battery management hardware/software that never automatically charges the battery to 100%. Here: > Software may limit charging above 80% when the recommended battery temperatures are exceeded https://www.apple.com/ca/batteries/maximizing-performance/ https://www.apple.com/ca/batteries/maximizing-performance/ I recall seeing another document on apple.com (that I can't find) that described the behaviour where leaving a macbook plugged continuously cycles between back and forth charge and discharge between something like 90-96% to avoid trickle charge and prevent wear due to heat. Anecdata: my work laptop has been basically stationary and therefore plugged in for the best part of the last three years, and the battery is in outstanding condition. My personal one has been mobile more often but still plugged in for extended durations, and at four years old its battery is in a similarly awesome condition.