![]() ![]() But what if you often need to operate on battery power, and need the full capacity to get the required run time? In that case - just do it. If you normally run the laptop on the mains then avoid doing it with a fully charged battery for long periods, as both the voltage and temperature will degrade it faster. If you need to run on battery power for an extended time, charge it up just before you need to use it, then recharge to your desired normal SOC afterwards. So for longest life you should maintain a low SOC when the laptop is on mains power, and also try to keep discharges shallow when operating on battery power when practicable. There are two main 'wear out' mechanisms in a Li-ion battery - damage caused by the stress of charging and discharging, and damage due to oxidation at high voltage and/or temperature. It's a good answer that tells you most of what you need to know, but I will add a few comments:. This answer mentions that the ideal battery percentage is aroundħ0% - does this mean I should keep my laptop always plugged in with
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