3G battery calibration

Discussion in 'iPhone Tips, Help and Troubleshooting' started by saladiro, Jul 30, 2008.

  1. saladiro macrumors 6502a


    May 7, 2007
    New York
    how do I calibrate my 3g battery. Let it drain to 20% or completly? How often

    Also is there a mac forum iPhone friendly websit. Typing this has my bwowser going crazy
  2. soberbrain macrumors 65816


    May 9, 2008
    I calibrated by draining until the phone turned off completely and then charging overnight. Did this 3 days in a row.

    You can go to mobile.macrumors.com or at the bottom left corner of the regular macrumors.com change "MacRumors Forums 3.5" to "iPhone Friendly"
  3. TuffLuffJimmy macrumors G3


    Apr 6, 2007
    Portland, OR
    I don't think phone batteries need to be calibrated anymore. They're pretty fancy now.
  4. i-John macrumors 6502a


    Jul 14, 2008
    The Republic of Texas
    That is true. There is nothing you can do to "calibrate" the battery to make it last longer on a single charge. It's usage that defines that.

    To preserve the life of the battery though, it's good to fully charge the battery, then let it drain completely every now and again. This keeps the electrons moving within the battery, and it makes it last longer over it's life.
  5. MrBibidy macrumors newbie

    May 2, 2004
    The newer iPod batteries were supposedly the same, no memory and very resilient, but if you dig a little in the instructions or online you will find Apple still recommending you let it charge fully with a higher powered charger (1 amp as opposed to the .5 amp charger that ships will all iPod family products) before you use it. I believed I actually read in the instructions that the iPods "likes higher powered chargers" (weird I know).

    I have been in the IT industry for a few years now and have owned and had access to hundreds of newer battery technologies that claim to have no memory and longer life spans. But, my own experience tells me they all still suffer from memory or calibration issues. I ALWAYS recommend that everyone upon purchasing a new tech toy make sure they allow it to fully charge the recommended length of a full charge as per the instructions. If you have access to a higher powered charger USE IT. I also recommend that every so often a full drain and recharge be performed a couple times in succession as a security measure.

    Hope this helps.
  6. RedHerringHack macrumors newbie

    Oct 14, 2008
    I think what he means is that in order for the iphone to know exactly how long the battery will last, and thus be able to show an accurate meter, the phone must be charged to full capacity, then allowed to discharge fully so the phone and battery know the true charge level.

    I know that my 3G needed it. When I first got it, it discharged down to the warning and then proceeded to last many more hours on empty. When I recharged it, the meter was more accurate.

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