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Battery Degrading - Months Used/Cycles/Battery Reading (rMB 2015)
- Thread starter polee
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Looks like I should be pleased with my 93%, 175 cycles in 8 months.
Have been down at 89% couple of months ago, maybe at about 100 cycles. So there might be some hope for you...
No idea why it fluctuates. Nobody has I'm afraid.
Yeah, I'm not thrilled. At this rate though it should qualify for replacement within the year. For reference I'm closing in on my wife's 2011 Air at ~83% and well over 1,000 cycles. My Surface Pro 3 has a design capacity of 42,100mWh and a current charge capacity of 42,500mWh after 148 cycles...
I'd be interested to know if there is a correlation between cpu model and battery capacity. I have a 1.2Ghz and it seems to run cooler than my friends 1.1. Their battery capacity is also much lower after similar time-frames and cycle counts. Could the extra heat be degrading the battery faster?
I doubt that. I have the 1.1Ghz and about 180 cycles at 92%. Not pleased but others have worse numbers.
Said that, I'm above the arctic circle so my battery hardly gets warm...
I am not as heavy a user as you, but my old MBA (first generation with SSD) tended to behave the same after 400 cycles. It is still in use and well north of that figure and the battery has been staying around the 80% level. To be honest, I can't tell much difference in battery life now that it is in the 80's from when it was new. I agree that people should just use the things and not worry about it.
Design capacity 5297, maximum charge 4872 (92%) and 14 cycles only. Device is in use for just a couple of weeks and manufactured all the way back in July. Did a full empty/recharge cycle but that seemed to get the total capacity down with from 93,8% with another 1.8%. Not worried at all (yet) mainly because the device is covered under AppleCare until end of 2018.
7.5/29/4861 (design capacity: 5297)
Still excellent battery life. I see this on a regular basis while programming and listening to music, in a dark room with manual brightness at 2 bars (keyboard backlight: 1 bar), and it proved accurate in practice (and the estimation does lower to 19h, 18h, etc...):
Usage:
Still excellent battery life. I see this on a regular basis while programming and listening to music, in a dark room with manual brightness at 2 bars (keyboard backlight: 1 bar), and it proved accurate in practice (and the estimation does lower to 19h, 18h, etc...):
Usage:
Let is settle for some time, my own 1.2 rMB sits between 94%- 95% and had done since day one for the last 9 months.
Q-6
34 cycles, 91% here.
Even out of the box it was never above 5000mah which is quite alarming. Only bought in November, so I'll see what happens in the next 9 months.
That said, ignoring the numbers, I've never had a problem with real world battery life, always lasted long enough between charges for my usage.
Even out of the box it was never above 5000mah which is quite alarming. Only bought in November, so I'll see what happens in the next 9 months.
That said, ignoring the numbers, I've never had a problem with real world battery life, always lasted long enough between charges for my usage.
Good to know and that has been my experience so far as well. I have been pretty happy with battery performance. I guess I am just wondering if it should be even better...and it progressively get worse, to quickly.
Is there a similar problem like this with MBP?
I was having similar battery issues as everyone in this thread. I brought my 2015 rMB to the Apple Store and had the Genius Bar run diagnostics on it. They found a bad voltage sensor. My rMB is currently in for repair. My point is, have your laptop checked out if your not satisfied with the battery performance.
I've always had very good battery stats in previous laptops.
My late '13 15" rMBP is about 400 cycles, 95% health iirc.
My previous late '08 15" MBP was about 750 cycles, 93% after 5 years of usage iirc. Which is impressive 'cos in hindsight that was the hottest mac laptop I've had, I could boil an egg on the back left portion of that keyboard lol! Heat being the enemy of battery health of course.
I took mine to genius bar in Switzerlandto check it out the battery. Normally Coconut show 85% health (on 230 cycle), with their test they found out that the battery is, in reality, on 98%...
I thought that was strange, but it makes sense. I'm doing now something like 9 - 10 hours of screen, the same I had when I purchased it. They can't give me an explanation about the displayed degradation on the system...
I thought that was strange, but it makes sense. I'm doing now something like 9 - 10 hours of screen, the same I had when I purchased it. They can't give me an explanation about the displayed degradation on the system...
My 1.2 is holding up the same as all my other Mac portables. I am currently abroad on an engineering project, running the rMB on battery all day on and off, with the system easily passing the 8 hour mark. coconutBattery reports 95.6% barring the initial drop off the battery has remained stable throughout.
Q-6
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On my 1.2 CoconutBattery and Apple`s battery stats are pretty much the same and holding stable.
Q-6
Q-6
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On my 1.2 CoconutBattery and Apple`s battery stats are pretty much the same and holding stable.
Q-6
I'm absolutely thrilled with my battery so far.
Full Charge Capacity (mAh): 5231
Charge Remaining (mAh): 5231
7 Cycles
The day before it had dropped to 5178, today its right back to 5231.
I am very careful with my batteries on my MacBooks though. I follow the 80/20 rule and never ever drain them completely. I sell Toyota's and have learned from Toyota their NiMH and Lithium batteries used in their Hybrids are treated this way by the on-board computer. The batteries are never stressed, this way they can last a very long time.
Full Charge Capacity (mAh): 5231
Charge Remaining (mAh): 5231
7 Cycles
The day before it had dropped to 5178, today its right back to 5231.
I am very careful with my batteries on my MacBooks though. I follow the 80/20 rule and never ever drain them completely. I sell Toyota's and have learned from Toyota their NiMH and Lithium batteries used in their Hybrids are treated this way by the on-board computer. The batteries are never stressed, this way they can last a very long time.
