Letting Battery Run All the Way Down

Discussion in 'iPhone Tips, Help and Troubleshooting' started by kas23, Jun 27, 2010.

  1. kas23 macrumors 603


    Oct 28, 2007
    Is letting your battery on your iPhone drain completely down (till it shuts itself off) a bad thing? I did it to my old 3G once and it was never the same, but it was old at the time. Now, I accidentally let this happen to my iPhone 4. Is this bad?
  2. quagmire macrumors 603


    Apr 19, 2004
    If you keep on doing it, yes it is bad. Apple recommends doing it once a month to keep it healthy, but 100% to 0% drains and then recharging is hard on the battery and does reduce its longevity. That is why GM at least is only allowing people the use of 50% of the Volt's Lithium-Ion battery. Its charge state is 30% to 80% where the wear and tear on the battery will be minimal. I did it twice to my iPhone 4 to calibrate the software, but I tend to charge my iPhone when it hits 20%.
  3. Applejuiced macrumors Westmere


    Apr 16, 2008
    At the iPhone hacks section.

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