Battery drain in shut down state. All Good
I see a lot of posts about Mac losing battery percentage wile the Mac is not only in sleep mode but also when shut down. My Mac Pro also does this but what im finding frustrating is all the responses to these posts making like the person posting has an issue with their Mac and they are filled with community users having the poster go through series of troubleshooting confirming the poster's anxiety that they in particular are exclusive in finding such issues.
the fact is EVERYONES Mac has a continuous but slight battery loss in either state. There is absolutely nothing wrong with the device and absolutely zero solution for rectifying the long slow battery dissipation. I have no idea if the battery tech has changed in recent years because I am aware that apple batteries 'did' indeed sit dormant in the power off state many years ago but they no longer do and I urge anyone who doubts to run some confirmation tests. Mine can be charged full (100%) at shut down and I can leave the Mac untouched for a two week period. Booting back up will give me around 96%. The usual extended 100-99% isn't enough to maintain the Mac in the 100% state of charge in times of lengthier shut down.
I only post this to hopefully reassure others. Your new (or old) Mac isn't faulty. People will come to tell me perhaps mine is faulty but I know it's good. I have no idea why anyone would insist in making out theirs doesn't lose charge when it is simply not true. they all do. I have run similar tests on several new MacBooks for the last 6 years..I have never found a single device that halts battery drain completely in those years.