Letting Battery Run All the Way Down

[kas23]

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?

 

[quagmire]

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%.

 

[Applejuiced]

Its good once in a while but not always.