Maximizing battery lifetimes

Discussion in 'MacBook Pro' started by DoNoHarm, Apr 28, 2009.

  1. DoNoHarm macrumors 65816

    DoNoHarm

    Joined:
    Oct 8, 2008
    Location:
    Maine
    #1
    Hello Everyone,

    So there seems to be several people on these boards complaining about batteries loosing their charge keeping capabilities after 100-200 cycles or so. I've tried to find some apple documents that describe how to maximize battery lifetimes. This one:

    http://support.apple.com/kb/HT1446

    seems to describe tips to maximize battery life WITHIN one charge, but I was wondering if anyone knows how to maximize battery lifetimes into 300-400 or even 500 charges. Also, to those who lost their batteries charge storing ability after 200 charges: is there anything you did that you think contributed to the shorter than normal lifetime of your batteries?
     
  2. Ov3rlord Falc0r macrumors regular

    Joined:
    Apr 29, 2009
    #2
    I heard somewhere that if you let your battery completely die then fully recharge it every time that it'll help keep your battery "healthy" longer. I've used this for years and I can't really tell if it helps or not but I have had above average battery life spans.

    Hope that helps.
     
  3. winninganthem macrumors 6502a

    winninganthem

    Joined:
    Jun 10, 2008
    #3
    I think that actually kills Lithium-ion batteries. For a Ni-Cad you would want to do a complete discharge, but you treat Li-ion ones differently.

    When I first got my MBP, I made the mistake of always doing a full discharge, so I ended up reducing it to 85% health in 130 cycles. >_<

    Here's an excerpt from http://www.batteryuniversity.com/partone-14A.htm

    "For Lithium Ion (Li-ion) batteries:
    Should I use up all battery energy before charging?
    No, it is better to recharge more often; avoid frequent full discharges.
    Yes, on batteries with a fuel gauge, allow a full discharge once a month to enable reset"
     
  4. Ov3rlord Falc0r macrumors regular

    Joined:
    Apr 29, 2009
    #4
    Ah, see well that would explain it. The batteries I've been using are all old. Lol, I haven't exactly upgraded yet.

    I guess it wouldn't matter to me anyways. My laptop (or soon to be new Macbook Pro) are plugged in 95% of the time anyways.
     

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