I which my 2016 model looked like that. It's degrading fast :/Well –
View attachment 679986
rMBP 2015 13" base model. I got very upset when it dropped all the way to 99% for a moment
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Macbook 2015 Battery Capacity degrading fast ?
- Thread starter DAMNiatx
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So is the consensus that this issue affects both the 2015 and 2016 models? I was thinking about getting a 2016 model refurb, but can wait until the 2017 model comes out and see if they've fixed the issue.
After about 3 months of getting mine (2016 m3), I have a battery capacity of 95% (actually up from 93% which coconutBattery reported to me back in November). I think you need to give the computer a couple of months of usage to really determine its battery degradation. I think iPhones have this same behavior (quickly dwindling capacity, only to normalize after a couple of months)
Hopefully this new battery can hold its condition better ... but if it doesn't, it'd better die before May 2018, because that's when my AppleCare runs out
Looking back, buying AppleCare to prepare for the eventual bottom plate replacement on an Early 2015 12" MacBook was a good gamble. The new battery is holding up well after 3 months and 30 cycles.
I've also been more conscious about keeping the battery between 70 to 100 percent, usually plugged in when stationary. That could have had a positive effect on longevity. I used to drive the original battery low all the time, thinking that a full cycle was somehow good for it. In reality it was just wasting cycles.
And maybe the new battery, manufactured on 2016-10-26, really is more durable than the first generation. Wouldn't be a surprise, considering how tightly built these terraced battery cells are.
What percentage of battery life remaining did your MacBook have to get to before Apple replaced the battery under your AppleCare plan? Mine's generally around 85-86% now and since I'm only about 1.5 years into my AppleCare coverage I figure it'll easily breach 80% within the three years of coverage.
When they replaced he bottom plate, did they have to engrave the serial number of your macbook on to the new plate?
This is what I heard they do. You just have to look up the serial number in the about this Mac menu.
Keeping your battery between 70-100% all the time will actually cause it to degrade faster. Same with always keeping it plugged in. Batteries need to be used. 20-80% is the optimal zone for Lithium Ion batteries.
My 2012 MBA has over 1100 cycles and is still above 82% capacity. Original battery form August 2012. Battery was rated for 1000 cycles at 80%.
My iPhone 7Plus is at 170 cycles and still at 100% capacity.
I never expose my batteries to heat or cold, never let them drop below 10%. Those are pretty much the only things you need to do to maintain health.
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I would recommend using your battery more often. 95% after 12 cycles is pretty bad.
Keeping the MBP plugged in will not harm the battery since the battery only charges once it gets down to about 95% while plugged in. Once it reaches 100%, the charging circuitry turns off.
Apple is using batteries that are doing some weird things over the last two years. I have a one year old 2012 MBP and a one year old 2015 MBP. Both have around 17 cycles and the capacity on both is about 95%. It seems this is about right for the MBPs over the last few years.
Also, my 6S+ has 106 cycles on it with 94% capacity, my 6S has 115 cycles, with 95% capacity and my 6+ has 205 cycles with 97% capacity.
I wouldn't worry about what these battery apps say the capacity is. On all my phones, it fluctuates from 89% to 96% capacity depending on the moons cycle or how I breath on them. Same with the MBPs.
There's a guy on one of the Android forums who claims that one should never let their battery drop below 40% and never charge it above 70%. That's just nuts. People have crazy ideas when it comes to batteries.
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I'm aware of this. I was saying leaving it plugged in all the time is bad because the battery is not getting used.
This is true. I use mine on battery power about once a month. Neither one of my MBPs leave the house so I really have no need for the battery other than using the computer when there's a power outage a few times a year. I just buy MBPs so that I can use them anywhere in my house easily.
Mine was around 78 percent. I was waiting for it to drop below 80 before bringing it to service. They did some proprietary tests to confirm it was time for a change.
I have to say I was extremely upset when I saw battery capacity drop as low as 98% for a moment!!! Give me that 103% I am used to!!!
(rMBP 2015, bought 8 months ago as you can see)
Mine has stabilized at around 94%. I didn't buy Apple Care for either of my MBPs because I figured if I ever had to replace the battery, it would cost less then Apple Care and it does.View attachment 691626
I have to say I was extremely upset when I saw battery capacity drop as low as 98% for a moment!!! Give me that 103% I am used to!!!
(rMBP 2015, bought 8 months ago as you can see)
I didn't but them to take with me, they just stay at home. I mostly wanted the battery power for the few times a year there is a power outage and in the extremely rare possibility I do travel for a vacation or something.
I don't see anything weird about it though? Before I saw the screenshot I expected it to fluctuate between 85% and 105% within a week. The capacity measurements are just indicators really. My rMBP started with 103-104% and now after 38 cycles and me owning it for 9 months it's "down" to "only" 100%. But if you look at my screenshot it also goes a bit up and a bit down.
But yours is at 6500mAh while his is at 4200mAh @100%. That is strange.
I don't have a MBP but a rMB that is at 4200mAh now @82%. Its original capacity was 5300mAh.
I've seen the capacity dropped quite fast. As you can see on the list, it's 101% on 5/3 but got down to 99% on 10/3. Before that, it took almost 2 months to get down from 102% to 101%. Since then, the capacity is changing like crazy for the last 3 days.
Mine is 2016 13 inch with Touch Bar, the design capacity is 4315 mAh.