Capacità batteria Mac book Pro 2020 base

Google Translation:

Boromir12 wrote:

Is it normal to have 4413 (mAh) of maximum capacity after 295 cycles? I'm worried that with each recharge the capacity drops by 20 - 30 (mAh). Thanks to those who reply!

Most of my experience is with the Apple Intel Macs with older batteries. I'm still studying the Apple Silicon Mac batteries. I know they seem to behave a bit differently, but I'm also checking much newer batteries as well.

The Battery's Full Charge Capacity (FCC) actually fluctuates up & down somewhat significantly with Apple OEM batteries even when new. I have seen fluctuations up to about 300mAh which appears to be normal for the Apple OEM batteries. I only begin to worry when the FCC fluctuations begin to exceed 400-500 mAh, but I also take into account how those fluctuations occur as well.

One of the biggest issues is when the FCC value nears 80% of its original Design Capacity. Most people will be Ok with a battery until the FCC gets near 77% of the original Design Capacity.

Charging & discharging the battery doesn't really hurt the battery in the way you are implying, but it can affect the normal fluctuations of the FCC which already exist especially when the battery ages and cells begin to fail indicated by the larger FCC fluctuations about 500mAh.

FYI, Battery Cycle Count is irrelevant for determining battery health except for when the cycle count nears 1,000 cycles which indicates expected end of life. The Cycle Count is irrelevant because age is the bigger factor in battery health. Laptops which are connected to the power adapter most of the time will have extremely low cycle counts after 5 years, but someone who uses the battery every day may reach 1,000 charge cycles in just 3 years. However, a battery at 5 years old will have some of its chemicals and internal connections deteriorating where it may begin to have a weak cell. A weak cell can be seen by users when the battery charge level drops significantly in seconds such as dropping from 50% charge to 40%.....most times this is more noticeable when the battery charge is 20% or below and the laptop powers off instead of hibernating.

As a comparison, I have only studied a few Dell laptop batteries...all at the point of being well used with their FCC value between 50% - 65% of the original Design Capacity. From my brief tests of just a few Dell batteries, I have found that they don't seem to have FCC fluctuations like the Apple OEM batteries. In fact the FCC of Dell OEM batteries seem to be steady for a long time, then their FCC drops significantly, then stays there for another long stretch of time, before another significant drop of the FCC.

Unfortunately Apple changed the information one of their command line utilities report for the battery data, I haven't had the opportunity to really study the behavior of the Apple Silicon Mac batteries, plus I haven't had the need yet since the Apple Silicon Macs are only now just starting to get to the point where they may develop some issues. I'm still fine tuning a custom script to process the battery information from another macOS command line utility.

I believe the Design Capacity of the batteries for the Intel & M1 13" MBPros are about the same (5,086mAh & 5,103mAh respectively). This means your FCC value of 4,413mAh puts the battery's capacity at 86% which is very good. Depending on how you use the laptop and how long you need for battery run time, most average users will probably be Ok until the FCC value drops to somewhere between 3,900 - 4,082 mAh.

I usually advise people to ignore the battery information until the battery is no longer performing to the user's expectations and needs. When this happens, check the Battery Condition and Cycle Count and even run the Apple Diagnostics. If the Cycle Count is nearing or exceeds 1,000 cycles, or if the Condition is "Service Recommended", then have the battery replaced. On a lot of batteries I have found that a battery may have a hardware failure, but the Condition still shows "Normal" which is why I started to study the batteries and devised a stress test & monitoring of FCC values since that tends to reveal a bad cell or hardware failure fairly well. It can also help me to figure out the best time to run the Apple Diagnostics so it will report a battery issue, or the battery condition will show "Service Recommended" so that Apple will replace the battery. Of course if you want to learn more, then monitor the FCC values. I hope this helps you.