How to reset battery cycle count to zero?

Discussion in 'MacBook Pro' started by ng1012, Oct 22, 2013.

  1. ng1012 macrumors newbie

    Jan 21, 2013
    I borrowed a new 2013 macbook pro from my friend. She is a perfectionist. I used MBP outside and charged for around 40 times and the cycle count now is 30. I returned the macbook to my friend and she yelled at me that the value of the macbook pro decreased a lot if she wants to resell it.

    Any tools to reset the battery cycle count?
  2. Yahooligan macrumors 6502a


    Aug 7, 2011

    And she sounds like a nut, sweating over inconsequentials. Don't borrow her stuff anymore.
  3. dreamsINdigital macrumors 6502

    Sep 4, 2006
    30 cycles is very low and nothing to worry about; it still has plenty of life left. The average consumer also does not know to check for cycle counts when buying a used Mac. Your friend is being paranoid.
  4. Astroboy907 macrumors 65816


    May 6, 2012
    Spaceball One
    Your friend is crazy. The battery wears down even without use, using just slightly expedites the process. New MacBook Pro batteries are supposed to last 1000 cycles and retain 80% battery capacity @ 1000 cycles. Usually the resale value of it decreases more at 600 cycles.
    With 30 extra cycles the resale value dropped like $5, if that... Lol.
    Also- ask your friend why she got a laptop if she intends not to take it off of the charger ever (which is actually worse for the battery sometimes, it can damage the battery just as much as using it excessively). Tell your friend to buy a desktop if she cares so much about the battery :rolleyes:
  5. hachiman macrumors regular

    Jan 31, 2008
    Get a power drill and stick that bad boy into the Odometer and ... oh wait, that's for old cars. Sorry, don't know how to turn it back on a computer chip. :p
  6. ElderBrE macrumors regular


    Apr 14, 2004
    The tool is to change the battery itself, heh. Crazy friend by the way.
  7. sholzer macrumors regular

    Jun 21, 2013
    at 1290 cycles and my battery still holds about a 3-4 hour charge. Your friend is crazy lol
  8. ng1012 thread starter macrumors newbie

    Jan 21, 2013
    Thank you so much everyone. Yes, she is quite annoying. I did not check how many cycle count it was when you lent the laptop to me but she told me there was only 3 cycle count.

    There is no bios tools like PC's to alter the cycle count?
  9. Orr macrumors 6502


    Oct 8, 2013
    I wouldn't be entirely surprised if this machine is stolen and the OP is trying to reset it for a higher resale value. Never heard of anyone caring at all about a cycle count difference so minimal.
  10. Astroboy907 macrumors 65816


    May 6, 2012
    Spaceball One
    There's pretty much nothing you can do unless you are quite good at modifying some system files (which I have no idea how to do so don't ask me). Short of replacing the battery there's likely nothing more you can do.
  11. CausticPuppy macrumors 65816

    May 1, 2012

    Having those cycles on the battery is probably not as bad as it would have been if you just left it plugged in the entire time.

    Also your friend is psycho.
  12. priitv8 macrumors 68040

    Jan 13, 2011
    There's this guy Charlie Miller who tried hacking them. Somewhere he published the source of his testing code, but according to sources you can also explode your battery if you mess it up. Can't say by heart if charge cycle counter is a modifiable parameter, but you can look it up in TI's spec sheets, referred to in Charlie's whitepaper:

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