LOLLIPOPPY
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- Apr 28, 2014
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Perform a soft reset on your phone and use it till the battery level is down to 10% (there should be a pop-up warning for low battery).
Turn off your iPhone or put it into "Airplane" mode and plug in your charger until it is fully charged.
Voila!
Lithium battery no longer need to calibrate. It will damage it faster instead. If you read Apple website, they no longer include the full discharge and then charge method already. For me 100% can last one and a half day. Just turn off background, those location services you don’t use and battery can last more.