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tbeaumont

macrumors member
Original poster
Nov 19, 2014
68
22
Atlanta
Wanted to see what the design capacity of the new battery is and is your full charge capacity greater than the design capacity or less....thanks
 

dsc888

macrumors 6502
Jun 25, 2010
383
154
Boston, MA USA
Mine reported 8847 mAh on Cycle Count 1. The Design Capacity is 8790 mAh. And the battery is basically at 100% with very little "extra" capacity unlike my 2012 rMBP which was like 104% at Cycle Count 1.

My battery is made by DSY on 9/20/2019 and had about 98% charge on it when I took it out of the box yesterday at the Apple Store.

I thought the battery capacity mAh rating on our 16 inchers are supposed to be HIGHER than what CB is reporting. I wonder if it's a bug that will get squashed with an update.
 
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mikethebigo

macrumors 68020
May 25, 2009
2,158
617
New i9 16" MBP purchased today, currently at 100% with 8818 mah, design capacity 8790.
 
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Nikita Zelenyuk

macrumors newbie
Nov 22, 2019
22
2
This is my results. Still monitoring the battery, cause Mac lives about 5 hours light usage after 1 week. Don't think that this is normal. Will wait one more week and if it stay the same will return it or exchange it.
 

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FrankyDM

macrumors newbie
Oct 17, 2013
21
17
Brussels
What mAh is Apple advertising? I didn't find this anywhere.

Only spec I saw is: "Built‑in 100‑watt‑hour lithium‑polymer battery".
Assuming the voltage is 12V, a Design capacity of 8790mAh would be equivalent to about 105Wh.
Seems about right to me.
 
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miroki

macrumors member
Nov 8, 2018
44
9
What mAh is Apple advertising? I didn't find this anywhere.

Only spec I saw is: "Built‑in 100‑watt‑hour lithium‑polymer battery".
Assuming the voltage is 12V, a Design capacity of 8790mAh would be equivalent to about 105Wh.
Seems about right to me.
oh it makes sense then.

Thanks for the enlightenment!
 
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sebpettersson

macrumors newbie
Sep 5, 2019
23
21
What mAh is Apple advertising? I didn't find this anywhere.

Only spec I saw is: "Built‑in 100‑watt‑hour lithium‑polymer battery".
Assuming the voltage is 12V, a Design capacity of 8790mAh would be equivalent to about 105Wh.
Seems about right to me.

According to to iFixit, it's 11.36 V, which gives ~100Wh.
 
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bevsb2

Contributor
Nov 23, 2012
1,881
786
My base model purchased 9/15 is 100% with full charge 8836 mAh and design capacity 8790 mAh.
 
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tbeaumont

macrumors member
Original poster
Nov 19, 2014
68
22
Atlanta
Thanks to everyone for their fast replies. My MacBook Pro has a build date of 11/11 and the battery was made on 10/9. Out of the box the battery was showing at 100% and 7900 for current charge and design capacity at 8790. After 20 minutes on the charger the battery gradually moved up to 8750. Then I unplugged the charger and turned the brightness down to 50% and eventually the current charge move up to 8853. Wonder if this is normal for a new battery?
 
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BigMcGuire

Contributor
Jan 10, 2012
7,212
8,841
the Alpha Quadrant
Thanks to everyone for their fast replies. My MacBook Pro has a build date of 11/11 and the battery was made on 10/9. Out of the box the battery was showing at 100% and 7900 for current charge and design capacity at 8790. After 20 minutes on the charger the battery gradually moved up to 8750. Then I unplugged the charger and turned the brightness down to 50% and eventually the current charge move up to 8853. Wonder if this is normal for a new battery?

I have seen this happen. That’s why I only take a reading at full charge - when it stops charging which can be a long time after it hits 100%.
 
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rex450se

macrumors 6502
Apr 9, 2011
259
70
Independence, MO
This is my results. Still monitoring the battery, cause Mac lives about 5 hours light usage after 1 week. Don't think that this is normal. Will wait one more week and if it stay the same will return it or exchange it.

I just noticed you have 11 battery cycles on your machine already so I went and checked mine on my 2018 MBP that I got almost exactly a year ago and it has 14. Definitely different levels of usage between us. Mine will probably go up considerably when I give it to my wife when my 16" arrives on Wednesday.
 
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Nikita Zelenyuk

macrumors newbie
Nov 22, 2019
22
2
I just noticed you have 11 battery cycles on your machine already so I went and checked mine on my 2018 MBP that I got almost exactly a year ago and it has 14. Definitely different levels of usage between us. Mine will probably go up considerably when I give it to my wife when my 16" arrives on Wednesday.
How is it possible? Did you charge your Mac only 14 times for whole year?
 
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dsc888

macrumors 6502
Jun 25, 2010
383
154
Boston, MA USA
How is it possible? Did you charge your Mac only 14 times for whole year?

More likely, he just kept it plugged in most of the time. It's good to "let the electrons flow" by running it on battery every now and then to not cause capacity issues even though these batteries are supposed to have no memory effect. I have all my MacBooks Pros plugged in most of the time and have about 32 cycles on my 2018.
 
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Nacho98

Suspended
Jul 11, 2019
729
672
I've got 16 on my computer purchased a year ago today. 2 of those happened this past weekend.
 
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benshive

macrumors demi-god
Feb 26, 2017
665
5,905
United States
I thought the battery capacity mAh rating on our 16 inchers are supposed to be HIGHER than what CB is reporting. I wonder if it's a bug that will get squashed with an update.
This is normal. Some batteries leave the factory a little over the listed original capacity and some a little under. It's just a gamble. It doesn't affect longevity of the battery.
 
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tbeaumont

macrumors member
Original poster
Nov 19, 2014
68
22
Atlanta
This is my results. Still monitoring the battery, cause Mac lives about 5 hours light usage after 1 week. Don't think that this is normal. Will wait one more week and if it stay the same will return it or exchange it.

Interesting my battery behavior is very similar to yours Nikita. Both our batteries were made the same day by the same manufacture. I have yet to be able show a full charge capacity number above the design capacity when plugged in. Only way to accomplish this is to turn down the brightness level when unplugged.
 
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7even

macrumors 6502a
Jan 11, 2008
984
18
These numbers will change over time without too much pattern other than a gradual downwards trend. There's nothing wrong with your battery. Here's the history for my older machine. You can see it bounce near the end for pretty much no reason and the current capacity is higher than what it had 100 cycles ago.

Generally you'll see peak capacity after a bunch more cycles and it will start to decrease from there.

Screen Shot 2019-11-25 at 5.55.32 PM.png
 
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Nikita Zelenyuk

macrumors newbie
Nov 22, 2019
22
2
Interesting my battery behavior is very similar to yours Nikita. Both our batteries were made the same day by the same manufacture. I have yet to be able show a full charge capacity number above the design capacity when plugged in. Only way to accomplish this is to turn down the brightness level when unplugged.
Check this option. For unknown reasons mine wasn't checked. Now the battery life is way batter than before.
1574776965146.png
 
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JustHereforHelp69

macrumors newbie
May 9, 2018
25
12
Screen Shot 2019-11-26 at 12.48.57 PM.png

I think I got the short end of the battery capacity stick, although this could change after a few more cycles (I hope)
 
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7even

macrumors 6502a
Jan 11, 2008
984
18
I think I got the short end of the battery capacity stick, although this could change after a few more cycles (I hope)

Discharge all the way + charge all the way to calibrate; works for most batteries. Battery capacity estimation isn't a very exact science. Same laptop as in my screenshot above, now one cycle later, the capacity is "down" almost 100 mAh.

Also y'all laptops are "older" than mine (my 16" is from 11/18) but have newer batteries (mine's from September) ?
 
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