good idea using macbook with ac adaptor on?

Discussion in 'MacBook Pro' started by spick, Aug 18, 2007.

  1. spick macrumors member

    Aug 17, 2007
    I know that laptop batteries loses life as they ages by cycles and some even lose life because of overcharge. So I was wondering if I'm using my macbook with the ac adaptor plug in, am i using the power from the battery or straight from the ac.

    Should I use it with the ac plug in when i'm at home or should I just use the battery and charge it when it gets low?
  2. great high wolf macrumors regular

    great high wolf

    Jan 30, 2006
    You won't be able to overcharge it. Li-polymer batteries include special circuits to stop that happening.
  3. /V\acpower macrumors 6502a

    Jul 31, 2007
    To continue on what as been said before, the battery as a circuit who stop the charging when on 100% charge.

    For your question about the energy coming from the battery or the charger, it come from the charger. However, from time to time, the computer may use both the charger energy and the battery energy when he need a big amount of energy quickly, like if you insert a CD at the same time you are searching the harddrive and photoshop is doing a big job in background. But it is generally quick moments so the vast majority of time, the Macbook is running directly from the AC.

    For the same reason, the Macbooks are designed to run at 50% of their speed capacity if you are using the computer from the AC without a battery to avoid running out of energy if a quick energy boost is needed.

    Also, if you want to maximize your battery, you should calibrate it like Apple suggest :


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