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View Full Version : MBA 2011 13" Battery stats after 6 weeks




Chairman.Jobbie
Sep 26, 2011, 12:58 PM
Thought this might be of interest to those interested in battery usage stats.

http://f.cl.ly/items/1X2J3y110h2Y3P030t0T/Screen%20Shot%202011-09-26%20at%2018.32.05.png

Brought on Aug 15th 2011 i think. So after 6 weeks its dropped 60 mAh or 171 mAh from max - 1 to 3%.

Ive consistently gone from full charge to under 10 mins left and then plugged in the charger to a full charge. Sometimes its gone to zero/off. I havent left it at zero over night (maybe once?).

66 cycles in 6 weeks :eek: = 11 times a week (1.57 times a day)!

Note : It says 7 months old but its a 2011 model so i dont understand that except maybe Apple had some part or the complete mba in storage for 6 months before selling.

UPDATE : I get approx 4.5 - 5.5 hours usage - so avg 5hrs - doing nothing specific. Some downloading, surfing, text work etc. Nothing too processor intensive. Without WiFi on & just text work id get 7hrs. 7hrs as standard would be great.... maybe 2012 model!?



stark4
Sep 26, 2011, 01:19 PM
yeah i don't understand how the program know how old is the the mba

jsolares
Sep 26, 2011, 01:24 PM
Thought this might be of interest to those interested in battery usage stats.

Image (http://f.cl.ly/items/1X2J3y110h2Y3P030t0T/Screen%20Shot%202011-09-26%20at%2018.32.05.png)

Brought on Aug 15th 2011 i think. So after 6 weeks its dropped 60 mAh or 171 mAh from max - 1 to 3%.

Ive consistently gone from full charge to under 10 mins left and then plugged in the charger to a full charge. Sometimes its gone to zero/off. I havent left it at zero over night (maybe once?).

66 cycles in 6 weeks :eek: = 11 times a week (1.57 times a day)!

Note : It says 7 months old but its a 2011 model so i dont understand that except maybe Apple had some part or the complete mba in storage for 6 months before selling.

You should'nt be surprised if you're using your MBA all day going from full charge to under 10mins all the time, as that is one cycle.

It uses the serial number to estimate the age, not sure if it uses the battery (if it's even accesible to the OS) or the machine one, and it hasn't been updated to the new MBA model yet.

hfg
Sep 26, 2011, 01:28 PM
The funny part is the 435 watt power usage! :eek: :eek: :eek:
You would have to charge the battery back up every minute or so.

... Don't think so .... ;)

smokedog
Sep 26, 2011, 02:37 PM
66 cycles in 6 weeks :eek: = 11 times a week (1.57 times a day)!


I'm on 9 cycles after 6 weeks because I leave my plugged-in.

Chairman.Jobbie
Sep 26, 2011, 02:39 PM
You should get out more ;)

jamesr19
Sep 26, 2011, 02:43 PM
It uses the serial number to estimate the age, not sure if it uses the battery (if it's even accesible to the OS) or the machine one, and it hasn't been updated to the new MBA model yet.

Pretty sure it doesn't use the battery info to calc the age of the laptop cos I had my one replaced in my MBP to a brand-spanka and the age didn't reduce/change

scarred
Sep 26, 2011, 05:50 PM
If it makes you feel better, I'm at 96% with 26 cycles.

Brandon0448
Sep 27, 2011, 12:55 AM
Im at 96% with 37 cycles, I haven't calibrated my battery since I first got it about 2 months ago.

ChrisOs
Sep 27, 2011, 03:47 AM
I'm at 92% current capacity (6230 mAh) with 32 cycles... and pretty pissed.
Already went to an Apple store for them to check it.
They said Coconut and IStat are not official apple programs and that they will run their own analysis. Conclusion: They say it is "fine"...

Patrick J
Sep 27, 2011, 04:48 AM
GGJStudios will be in here any time now with a comprehensive barrage of hyperlinks regarding batteries.

In the meantime, let it suffice to say the batteries regularly fluctuate up and down the 9x%’s.

echo.park
Sep 27, 2011, 04:52 AM
42 cycles, 95% health, 6345 mAh

kelfaij
Sep 27, 2011, 07:52 AM
96 % health - 6457 off the 6700 - 38 cycles - mba since 4th august 2011

bigeasy_uk
Sep 27, 2011, 08:28 AM
It's saying my 2011 11" is 7 months old with 7 loadcycles, 102% battery capacity (4808mAh):)

GGJstudios
Sep 27, 2011, 01:39 PM
This should answer most, if not all, of your battery questions:
Apple Notebook Battery FAQ (http://forums.macrumors.com/showpost.php?p=9875442&postcount=23)

Chairman.Jobbie
Sep 27, 2011, 02:28 PM
This should answer most, if not all, of your battery questions:
Apple Notebook Battery FAQ (http://forums.macrumors.com/showpost.php?p=9875442&postcount=23)

I dont see any questions that need answering. This is simply a sharing of battery stats.:rolleyes:

Shapethelola
Sep 27, 2011, 02:39 PM
I dont see any questions that need answering. This is simply a sharing of battery stats.:rolleyes:

Well someone mentioned that he/she did not calibrate the battery once. Apple says the new batteries do not need calibration anymore after all as they come pre calibrated. No one asked about it but I guess that is an information everybody likes to know :-)