Does plugging in ones MBP extend the life of ones battery ?

IOW ... I would imagine that limiting the number of battery charging cycles extends the life of ones MBP battery ... so whenever possible, don't use the battery ... even for relatively short sessions away from my desk?

A cycle requires the cumulative discharge of the battery to empty, so whether you discharge the battery 100% at one sitting or 1% per sitting over 100 sittings, it's still only 1 cycle. In general if you are able to use the AC adaptor that is preferable, but if you must run on battery it doesn't really matter whether it's a long time or a lot of short times. It's important that the battery get discharged fully and recharged fully at least once very two or three months to avoid having the battery fail from disuse.

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