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Install sys-lite. Then wait until your battery is under 20%.

Start sys-lite and go to the charging screen. Charge your iPhone to 100%. Do not stop charging. Let it 'trickle' charge the battery. You will hear a sound, when it finished with 'trickle'

Repeat this procedure once a month.

  • iPhone.
  • Ios7
  • Battery app. For example sys-lite. It is free.