How to drain completely very bad calibrated battery?

Question

iPhone SE

iPhone con schermo da 4" introdotto nel marzo 2016 con specifiche hardware simili a quelle dell'6s. Disponibile in Argento, Oro, Grigio siderale, Oro rosa con 16 o 64 GB. Modelli A1662 e A1723.

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Juane9 @juane9

Rep: 1

Postato: 15 gen 2019

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How to drain completely very bad calibrated battery?

My iPhone SE’s battery worked pretty fine until I calibrated it. It goes from 100% to 40% in one seconds, then it lasts forever on 40% and then turns off. When it turns off it shows the without battery logo, but when I press the button the another time, it turns on, it lasts a few seconds and turns off again, and the same over and over again. How can I drain the battery to calibrate it properly?

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Soluzione Prescelta

arbaman @arbaman

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Postato: 15 gen 2019

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There’s not much you can do with such battery behavior..either the battery logic side or the iPhone charging circuit are faulty..all you can do is try to have your battery replaced or walk into a phone repair shop and ask them for help. Battery “calibration” is more a myth than a reality and as a matter of fact you won’t find any battery calibration procedure from Apple’s support.

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Respectfully Battery Calibration is a legitimate thing and can be useful in a variety of situations. As far as apple not having it on their forums I wouldn't trust them to know their elbow from their butthole.

However, both of your suggestions would be mine as well starting with a battery replacement. If a repair shop is the answer for this issue research into those shops is highly recommended.

15 gen 2019 da Jessica Dent

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Respectfully Battery Calibration is a legitimate thing and can be useful in a variety of situations. As far as apple not having it on their forums I wouldn't trust them to know their elbow from their butthole.

However, both of your suggestions would be mine as well starting with a battery replacement. If a repair shop is the answer for this issue research into those shops is highly recommended. — Jessica Dent

Howking @howking Rep: 1 · Answer 1 · 2019-01-15T12:11:08-07:00

Howking @howking

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Postato: 15 gen 2019

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Theoretically, the powermanagment should not work in DFU mode (get into DFU mode and do not charge) But the problem as described may not be due to poor calibration. It may be a faulty battery. Reconnecting charging to a fully discharged iPhone may take a long time before something show on display. You have to be patient.

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The battery worked well before, and when I turn on the iPhone again it has a completely different percentage. It seems to be a calibration issue.

15 gen 2019 da Juane9

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Brian Wood @thinksmartpc Rep: 5,4k Think Smart PC 6 11 · Answer 2 · 2019-01-15T12:14:55-07:00

Brian Wood @thinksmartpc

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Postato: 15 gen 2019

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More than likely you just need to replace your battery. Is this battery original to the device? If so, then just change it with a reputable parts supplier like iFixit and youll be good to go.

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