5 Replies Latest reply: Jun 12, 2013 2:46 AM by LowLuster
Maorriyan Level 1 Level 1 (0 points)

Hi All,

Does any body know how OSX count the power cycle count?

I noticed my MacBook Pro power cycle count increment by 2 instead of 1.


MacBook Pro (15-inch Early 2011), OS X Mountain Lion
  • LowLuster Level 6 Level 6 (12,015 points)

    That really can't happen. You probably aren't noticing the individual counts. A cycle is a full discharge and recharge or multiple discharges and recharges that equal one full dischrage and recharge. Like running the battery down to around 50% then recharging it. If you do that twice it equals one cycle. running the battery down to 75% then charging it would take four of them to equal one cycle count. So if you are running the battery down to 20% or lower then charging and again down to 20% or lower then charging depending on what you did in the recent past that could increase the count by 2 cycles.

    Maorriyan wrote:

     

    Hi All,

    Does any body know how OSX count the power cycle count?

    I noticed my MacBook Pro power cycle count increment by 2 instead of 1.

  • Maorriyan Level 1 Level 1 (0 points)

    Hi LowLuster,

    Thank you for your reply.

     

    Does this means if I keep my MacBook Pro fully charge (keep connected to power), the cycle count won't increase? Or keep connected to power is not a good habbit?

  • clintonfrombirmingham Level 7 Level 7 (29,965 points)

    I keep my MBP connected to mains almost always... however, I have a reminder set up for every two weeks so that I'll remember to disconnect from mains and let my battery run down to about 30-40% before connecting to mains again. That keeps the battery healthy and happy - I've had this machine since March of 2012 and my battery health is 99% with 163 cycles.

     

    Good luck,

     

    Clinton

  • LowLuster Level 6 Level 6 (12,015 points)

    It's fine to keep it connected 95%+/- of the time and to only run it on the battery when there isn't any AC power easily available.