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robook

macrumors newbie
Original poster
Dec 10, 2020
25
1
Hi I have a new problem with my battery. I bought this MBA M1 in 25 November 2020 and the maximum battery capacity was at 100%. Today is 8th January and the battery capacity is at 99%. It dropped quite fast I think, if this continue in this way my battery will be died in a couple of years. What do you think?
 

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Apple_Robert

Contributor
Sep 21, 2012
34,267
49,480
In the middle of several books.
It is not uncommon for a new battery to go down to 99% health or less. A lot of the time, the health goes right back up.

The battery is an every changing chemical reaction. If you leave the M1 plugged in all the time, run the battery down 10% or less a lot, or expose it to excess heat, these things can impact battery life over time.

I would not be worried with the battery and what you posted.

This is my M1 MBA that I bought 12/24/2020
 

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Last edited:

ghanwani

macrumors 601
Dec 8, 2008
4,478
5,521
It can bounce up and down quite a bit and can even exceed 100%. See the history of my battery.
 

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ROMAR

macrumors newbie
Jan 5, 2021
7
1
It is not uncommon for a new battery to go down to 99% health or less. A lot of the time, the health goes right back up.

The battery is an every changing chemical reaction. If you leave the M1 plugged in all the time, run the battery down 10% or less a lot, or expose it to excess heat, these things can impact battery life over time.

I would not be worried with the battery and what you posted.

This is my M1 MBA that I bought 12/24/2020
Which app do you use for showing the battery health?
 

Apple_Robert

Contributor
Sep 21, 2012
34,267
49,480
In the middle of several books.
Which app do you use for showing the battery health?
It is called Better Battery. Every day it tells me how long to use the battery before plugging back in. it is an excellent app. The developer is also a forum member.


 

ROMAR

macrumors newbie
Jan 5, 2021
7
1
It is called Better Battery. Every day it tells me how long to use the battery before plugging back in. it is an excellent app. The developer is also a forum member.


Thank you very much, so i downloaded ist an i will test ist for 30 days.

It looks very fine!
 
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ghanwani

macrumors 601
Dec 8, 2008
4,478
5,521
I don't know if it's worth trying to maximize battery life. I use my machine 100% on battery and routinely run it to 0%. I plug it in whenever not using the machine for an extended period. I've been averaging over 1 cycle per day. Yet after 650+ cycles, it's still reporting 87% which is approximately where it has stayed for the last 400 cycles.

If it's easy to do the optimization, go for it, but otherwise, the battery seems to hold up pretty well to arbitrary charging methods.
 

Hakiroto

macrumors 6502a
Jul 8, 2011
641
221
My M1 Air has had 36 cycles and is reporting a maximum capacity of 91%. Almost 10% down in ~3 months is terrible. I guess I'll be contacting Apple about this.
 

tps3443

macrumors 65816
Jan 24, 2019
1,406
908
NC,USA
My M1 Air has had 36 cycles and is reporting a maximum capacity of 91%. Almost 10% down in ~3 months is terrible. I guess I'll be contacting Apple about this.

How do you use your battery? Plugged in 100% all the time?

I am at 18 Cycles, Apple reports 100%, but 3rd party "Coconut Battery App" reports 97%.

91% after just 3 months does seem really fast. But then again, it does vary depending on the usage.
 

Hakiroto

macrumors 6502a
Jul 8, 2011
641
221
How do you use your battery? Plugged in 100% all the time?

I am at 18 Cycles, Apple reports 100%, but 3rd party "Coconut Battery App" reports 97%.

91% after just 3 months does seem really fast. But then again, it does vary depending on the usage.
Yeah, sure. I get that it depends on usage. No, it's not plugged in 100% of the time. For the majority of a normal working day, it's plugged in while connected to an external monitor but there are definitely many hours when it's used unplugged, too. I never let it drain down below ~20% and it's never left plugged in overnight, etc. I've had MacBooks for over 10 years now and never had any issues with batteries.

I ran diagnostics and it's showing there's an issue with the "power adapter". I ran again with my wife's charger (she has the same MacBook) and it said the same.

I guess there's a bigger issue here because it's literally not charging now, i.e. it was on 18% before and despite having being plugged in for a couple of hours, it's now on 17% and it says the battery is not charging. I'm sure Apple will help me out but the idea of not having a computer for even just a few days right now (being self-employed) is pretty worrying.
 

tasty17

macrumors newbie
May 8, 2020
17
3
My M1 Air has had 36 cycles and is reporting a maximum capacity of 91%. Almost 10% down in ~3 months is terrible. I guess I'll be contacting Apple about this.
25 cycles and 95% for me. Coconut battery says 88%. Seems horrible
 

Ghostrider72

macrumors member
May 24, 2020
50
11
I don't know if it's worth trying to maximize battery life. I use my machine 100% on battery and routinely run it to 0%. I plug it in whenever not using the machine for an extended period. I've been averaging over 1 cycle per day. Yet after 650+ cycles, it's still reporting 87% which is approximately where it has stayed for the last 400 cycles.

If it's easy to do the optimization, go for it, but otherwise, the battery seems to hold up pretty well to arbitrary charging methods.
Me too. I have had a Samsung laptop for over seven years and battery still runs good. That notebook switched itself off when battery reached a 7% charge level and asked for recharge. So basically I am recharging my new mba m1 in the same way: discharge up to 5 or 7%, then recharge to 100% and use it. I see here lots of people recommending to keep battery levels between 20 and 80% at all times (even Tesla says so) but in my experience this was a quick way to develop memory effect. I know, I know they say lithium based batteries are devoid of that but my extended experience says otherwise. I have been using rechargeable batteries since 1992 and started with the ni-cd type, moving to ni-mh and so on. They all have, to some extent, some memory issues so at least for now, I am sticking to my model. Hope this helps.
 

ghanwani

macrumors 601
Dec 8, 2008
4,478
5,521
780 cycles and still at 85%. I absolutely don't try to optimize anything. But I now typically use it in the morning (fully charged), run on battery, then charge at lunch time, use it till the end of the workday on battery, leave it to charge, use it again after dinner, and then put it to charge overnight.

I really do need an M1 so then I won't need to charge at all during the day.
 

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Madhawa

macrumors newbie
Jul 4, 2021
6
0
unfortunately Im at 36 cycles. 93% of Maximum capacity. I was having 20+hours of battery life at the beginning. now the workload is different so can't compare. do I need to contact apple for this?
 

Ghostrider72

macrumors member
May 24, 2020
50
11
unfortunately Im at 36 cycles. 93% of Maximum capacity. I was having 20+hours of battery life at the beginning. now the workload is different so can't compare. do I need to contact apple for this?
Did you keep it always under charge? Or, if not, at what level of discharge did you replug?
 

Madhawa

macrumors newbie
Jul 4, 2021
6
0
my battery temp is always at 30.5'C. cuz the ambient temp is around 23- 28'C.
additionally I use a samsung t7 SSD, I'm kinda suspect if that SSD have to do something with battery cap.
or just could be the temp.
I'm now at 93% of battery cap, 39 cycles and 7 months old.
 

disssenter

macrumors newbie
Oct 16, 2014
8
2
Mine has 91% after only 5 cycles. Always unplugged.
Coconutbattery says it has only 72.8% of design capacity.
For my use flow it is more than OK, but this unbelievable that it lost so much just in 5 cycles.
 

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