I bought a MacBook Pro 2020 and in 6months, it dropped to 88% percent in design capacity with only 42 cycles. I rarely use my Mac and it worries me, is it normal or should I go check with apple support. I have even turn on optimised battery charging and manage battery longevity. Thank you for time:)
Apple says that your battery should last for at least 1000 cycles and maintain at least 80% of its original capacity. However I have used Coconut Battery on several laptops and on one, a 2010 Macbook Air, the capacity actually INCREASED after initially showing a decrease that seemed alarming. It is presently at about 85% but had been as low as 80%. My conclusion is that utilities like Coconut Battery (and Apple's own About This Mac => System Report = Power) are not especially precise and have some "noise" in them. If your battery reduces to less than 80% prematurely while under warranty (or extended warranty), I believe Apple will replace the battery for you.
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Looking at the power information under system info, the battery is in fact not charged fully compared to many of the times where the "remaining charge" matches the full capacity. It shows it actually is only 99% of the full charge capacity vs the "remaining charge" as both seem not to match with charge remaining lower than the capacity (mAh)
Please tell me if this is just some sort of inaccuracy or something. Or if this happens usually and is something I shouldn't worry about. (Im getting thoughts it might get worse I'm worried even more please help me)
Batteries are considered Consumable Products. Over time it will degrade to a point where it needs to be replaced. The usage is normal as the capacity will go up and down all the time and never stay always at 100%. Apple Batteries are rated for 1000 Full Battery Cycles and / or 80% Capacity before needing Evaluation or replacement.
Huge thanks. So far, I don't see any symptoms of a damaged or swollen battery, only degraded capacity. I'm hoping I can still go another year or two before replacing the battery :) That is why I am minimizing my battery usage to only either emergency purposes or when I don't have access to a power plug. I still, however, use the battery sometimes, even when I have access to a power plug, but it does not happen often.
Going back to the original issue, it's probably not a big deal; my battery is working fine despite a degraded capacity, and I'm using the original charger that came with it. So the battery refuses to charge unless it is 99% in the menu bar, but in reality, is actually 95% or higher shouldn't be too much of an issue because the inaccuracy of the battery percentage in the menu bar and on coconut battery is pretty small, unless it gets to 10% or higher, that's when I should do something about it. But for now, I should be fine.
So, to sum up, 1271 Full Battery Cycles is well outside the expected life cycle of the battery and the only True was to determine the real health of the battery is to have the Computer Evaluated by the Professional
For additional reading on Battery and Apple Computers this link may help. About battery health management in Mac notebooks and especially for the M1 / M2 and Big Sur & Monterey If battery charging is paused or on hold on your Mac
A feature introduced into Big Sur & Monterey was to preserve the number of Full Battery Cycles - there was an Algorithm coded into the macOS. It is perfectly Normal for Big Sur , Monterey to Pause / Suspend charging the battery beyond 80% and hold it at that level. One can nudge / over-ride this by clicking the Battery Icon on Desktop Top Bar and allow charging beyond 80%. From observations, it will Pause / Suspend again once reading 90%. Same procedure to over-ride and will charge to 100%
And let's say the battery capacity does get on or below 80%. As long as it is still on "normal" No other battery-related issues aside from lower capacity. "Then" can I "still use" my Macbook battery? I'm not looking for actual facts here, I just want to know what you think and what you would do in my situation. MacBook battery replacements in my country are quite expensive so I want to get the most out of my battery before I replace it, I'm mostly talking about time here....
AFAIK, My battery percentage meter in the menu bar seems to be inaccurate. Comparing it to a coconut battery, the percentage in the menu bar is around 5% higher than coconut battery shows, which seems to be the accurate one.
Another thing I noticed, when the percentage bar shows 100% fully charged, and the charge LED turning green, while coconut battery showing 95%+ and still charging, it charges a bit slower than the speed of charge from 90%-100%, the moment the batter percentage bar turns 100% (inaccurate it might seem) the charging speed that goes from 95% - 100% in coconut battery is slower.
Another thing I noticed that when the battery is fully charged according to coconut battery When I do something resource intensive, the battery percentage drops slowly, (I don't know how much, in what time since I didn't record it, but I do know that it drops) even with the MacBook plugged in, and system report shows that it is fully charged and not charging, but coconut battery shows lower than 100% remaining charge but it is using adapter power instead of battery. Is the battery being used even when plugged in?
Is anyone else experiencing this? Is this trickle charging? I'm guessing it could be related to the slightly inaccurate menu bar percentage meter showing 100% even when it is a bit lower thus refusing to charge itself back to 100% due to it not being 99% or lower?
Yes, I know that 1270 cycles are a lot, but can I still keep using my battery? It shows my battery is "normal" in the menu bar. And the battery still hold up well, takes 8 hours from 100% to 5% with light chrome usage.
Apple judges the battery to be beyond expected life when above 1000 cycles or down to 80%. You can certainly continue to use it past those levels, which are approximate guidelines, not mandatory "stop" rules. You will get degraded performance but it is up to you. You are past 1000 cycles and are still a bit above 80%. So you are near end of life on the battery. Whether to replace it now or wait is up to you. I have replaced battery in a 2013 MacBook Air and it was quick and inexpensive when done by an Apple Authorized Service Provider. The new battery lasts twice as long as the previous one when it was new, and is superior in all respects.
As for why does it charge only to 98% or 99% and then seem to stop -- it may still be charging slowly then or not at all. If it stops charging before 100%, that could be a sign of the battery not operating optimally, which of course we already know it is not, it is down to nearly 80% and over 1000 cycles. I have a 2010 MacBook Air with its ORIGINAL battery and it charges up to 98% or 99% then the light is green and it won't or can't charge beyond that. Just signs of a degraded battery probably.
Batteries are consumables, just like tires on an automobile. You can drive your automobile around with worn out and bald tires, but it won't operate optimally and is probably not good to do, but you can certainly do it.
Safe to say that after like 5 minutes, it does charge to 100% capacity. just stuck at 99% for a few minutes. The Light is only green when it reaches 100% in the menu bar, but it is still charging because it is actually still 95% then after 20 minutes it gets to 99%, then to 100% after 5 minutes.
Is it risky to continue using my battery? What I am doing is keeping it plugged in every time I am using it if I have access to power, though I unplug it every night and use the battery 2 times a month. to maximize the time before I need to replace it, and to save the battery from degrading even more. If the battery is degraded, will it pose a safety hazard? can it possible damage the charger? Cause swelling? Or cause damage to the other internal components?
In conclusion: Although my battery is almost 80% and over 1000 cycles, I can still continue to use it despite its reduced capacity. Besides, the battery condition is both "Good" and "Normal" in Both Coconut battery and system report.
I think you can continue to use it for a while longer. If there is no swelling or other problem symptoms. If the keyboard starts acting odd, or the laptop gets hot easily, or it stops sitting flat on a flat surface, those are red flags for a swelling battery. Also, check around the trackpad, it should not be distorted and should be symmetrical in its border around the trackpad. A swollen battery is something to replace immediately.
Your battery is near end of life but is not at end of life! Also, even after it sinks below 80%, it can be used, just you can't go very long without connecting to a power supply. My daughter's 2013 MacBook Air had a "service battery" warning for years, but she never did replace it, so I did when I "inherited" her old laptop (which I made good again by replacing the battery and the internal SSD, both of which now have twice the capacity of the original items).
I purchased my MBA from the Apple store one month ago. On first use coconut battery showed 1 cycle already passed and the charge capacity at only 98.7% of the design capacity. Today, the fully charged battery shows at 97.8% of design value. 152ee80cbc
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