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Current Battery health 95% after 1 Month

182 Views 3 Replies Latest reply: Jan 29, 2014 2:20 AM by Retired Engineer RSS
Manuelkra Calculating status...
Currently Being Moderated
Jan 25, 2014 7:17 AM

How come my current battery health is allready at 95% after one month (18 cycles) of using my Macbook Air mid 13. I never leave it on power all the time as adviced. Does somebody know if this is normal?

MacBook Air, OS X Mavericks (10.9.1)
  • PlotinusVeritas Level 6 Level 6 (13,625 points)
    Currently Being Moderated
    Jan 25, 2014 7:34 AM (in response to Manuelkra)

    95% is just a rough calculated estimate by the SMC being fed info from estimates from the lithium cells that are read by chips that read mAh charge that constantly report and calculate.   Concretely actual battery stats can be deemed identical at 96 97  98 99 or 100%.


    Currently in Mavericks, after much testing on my own,  time "remaining" and likewise % estimates in some instances are skewed  this is being looked into


    however this in no way affects actual battery life or health.


    Normal, Ive seen new machines a couple weeks old read same 96 95%.


    Reset SMC and verify a change.

  • Retired Engineer Level 4 Level 4 (2,710 points)
    Currently Being Moderated
    Jan 29, 2014 2:20 AM (in response to Manuelkra)

    As long as the battery health is 80% or higher it meets Apple's specifications for the battery.  It is currently impossible to build a battery that is exactly 100% of the design specification.  Your battery is fine.


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