How to calibrate iPhone 4S battery?
Need to calibrate it! Need answer in full detail thanks.
Hopefully your numerical battery percentage is on, so you know exactly how much percentage you have. Let that drain down to just under 10'% of your battery.
Then plug in your iPhone and let it charge fully to 100% without being disrupted. This should calibrate your battery. One way to check is that you charge your iPhone using iTunes and make sure your iPhone and iTunes indicate that your battery has been fully charged simultaneously, if they indicate this at different times your battery has not been calibrated.
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