At 40 cycle count it's at 96% battery health , now i'm confused how i just use it , whether to use it plugged in most of the time and drain once or twice a month OR to use it only on battery after charging upto 80% . it also fell like battery backup has reduced.
Also is it true that battery health falls non-linearly.
40 cycles or 4% is too soon to make a reliable extrapolation. MacOS has battery health management automatically built in and simply connecting to the charger when you can and allowing it to handle your battery health management is the best approach. Over time it will vary the battery level below 100% in the most optimal way. Discharging your battery purposefully every month is not wise because the battery is a consumable and using up its internal capability this way will shorten its life. The methods used to "measure" battery health are only approximate so they are not precise, and also battery resources are used up non-linearly.
You will be best served by connecting the battery to a charger when it is available and allowing the internal battery health management to optimize the battery lifetime.
40 cycles or 4% is too soon to make a reliable extrapolation. MacOS has battery health management automatically built in and simply connecting to the charger when you can and allowing it to handle your battery health management is the best approach. Over time it will vary the battery level below 100% in the most optimal way. Discharging your battery purposefully every month is not wise because the battery is a consumable and using up its internal capability this way will shorten its life. The methods used to "measure" battery health are only approximate so they are not precise, and also battery resources are used up non-linearly.
You will be best served by connecting the battery to a charger when it is available and allowing the internal battery health management to optimize the battery lifetime.
Ignore the battery information until the battery is no longer performing to your expectations. People don't realize how these Apple Lithium Batteries work.....people are only just recently beginning to observe the Maximum Capacity value which Apple only recently started showing to users. The Apple Lithium Batteries will have their Maximum Capacity value rise & fall during normal use......it is perfectly normal. I have personally studied the Apple Lithium Battery behavior for many years now.....long before Apple provided such an option to users. I have tried to explain it with an example in this other post here:
Apple battery behavior explained -- HWTech - Apple Community
Also is it true that battery health falls non-linearly.
Yes. Not only that it can either increase or decrease between charge cycles.
The rage of change cannot be extrapolated to some future date.
Lawrence Finch's When to charge your iPhone or iPad - Apple Community is a good reference that is equally applicable to Macs. As he wrote,
"While this tip is specifically for iOS devices, the same principles apply to all other Apple devices (watches, AirPods, MacBooks) as well as most other manufacturer’s products that have Lithium chemistry batteries."
Thank you.
Now it is at 95% today at same count. why would they provide these details
[Edited by Moderator]
Battery health on my MacBook Air M2 decreasing rapidly.
