Tips: Minimise MacBook's cycle count and prolong battery life

I'm a developer and my 2014 MacBookPro is plugged in all the time, except when I'm traveling and don't have power. But mainly it is plugged in. My current cycle count is 381. My full charge capacity is 7009 out of a designed max of 8440. I guess that means I'm at 83% health. Not bad for a six year-old machine that's been beat half to death.

Keeping your Mac plugged into the mains will reduce the cycle count— you can not over charge your Mac.

There is no harm.

About Mac notebook batteries - Apple Support

https://support.apple.com/en-us/HT204054

Determine battery cycle count for Mac notebooks - Apple Support

https://support.apple.com/en-us/HT201585

Batteries - Maximizing Performance - Apple

https://www.apple.com/batteries/maximizing-performance/


Being lazy while still helping ... https://discussions.apple.com/thread/251126100

The important part is not running it dead because one complete 100percent-to-0percent is 1 cycle, plus "completely dead" is not good. If you ever end up doing that, do not be surprised if it takes up to 30 minutes after plug in to even show life , because Lithium ion can do that.

If you keep your laptop plugged in most of the time I would recommend once in a while running the laptop on just the battery so the battery gets a little exercise. I would suggest doing this at least once a month because it can easily become a habit by always running the laptop on battery on the 1st day of each month.

Also to add to @steve359's comment about issues with letting the battery become completely discharged: If the battery is left completely discharged for any length of time it will likely cause internal damage to the battery which may lead to a premature failure.