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Apple iPhone 8

Battery History 2017

Measured Value Acquisition

The basis for this series of measurements are screenshots and calendar records, since Apple does not offer a device monitor. The relative energy consumption of apps in percent, battery status shortly before start of charging, at the beginning of charging, after charging was recorded with screenshot. Thus, a relatively accurate indication of the battery power is possible. This is strongly influenced by mobile radio reception quality, frequency of the cell changes and by the utilization intensity. I use my iPhone a little since I work during the day and am not a smartphone zombie (e-mails, internet, calendar data maintenance, SMS, iMessage, evening music listening). On weekends and holidays I use the iPhone frequently (books as a Kindle edition, emails, photography, internet, listen to music, calendar, SMS).
Apple's operating system iOS switches the power saving mode on automatically at 20% residual charge and after battery charging 80% again. Without need I will never let the battery get so empty (this is stress for the battery!). Unless otherwise stated, I use the iPhone after charging to max. 80% to the next charge without power saving mode. When little time is available, I like to use the power saving mode to shorten the charging time.

Logged Measurement Data

28.09.: Battery charge via USB on Notebook Sony VAIO Z12X9E/X to 57% (iOS version 11.0.1)
Battery still has: 45% at 23:45. First time charging the battery in this new iPhone.
Battery charged: 57% at 00:35. Charging without power saving mode.
Conclusion: 12% in 0:50 h.

29.09.: Battery charge at Anker 36W 5V/7.2A 4-port USB charger to 77% (iOS version 11.0.1)
Battery still has: 46% at 07:47. Battery life without power saving mode: 7:12 h.
Charged: 77% at 08:11. Charge without power saving mode.
Conclusion: 31% within 0:24 h.

29.09.: Battery charge via USB on Notebook Sony VAIO Z12X9E/X to 80% (iOS version 11.0.1)
Battery still has: 34% at 23:09. Battery life without power saving mode: 14:58 h.
Battery charged: 80% at 01:05. Power saving mode from 23:11.
Conclusion: 46 % within 1:56 h.

30.09.: Battery charge at Anker 36W 5V/7.2A 4-port USB charger to 78% (iOS version 11.0.1)
Battery still has: 33% at 13:02. Battery life without power saving mode: 11:57 h.
Battery charged: 78% at 13:51. Charging without energy saving mode.
Conclusion: 45% within 0:49 h.

30.09.: Battery charge via USB via USB on Notebook Sony VAIO Z12X9E/X to 80% (iOS version 11.0.1)
Battery still has: 30% at 19:44. Battery life without power saving mode: 5:53 h.
Battery charged: 80% at 21:53. Power saving mode from 19:50.
Conclusion: 50% within 2:08 h.

01.10.: Battery charge at Anker PowerCore Edge 20000 mAh to 80% (iOS version 11.0.1)
Battery still has: 31% at 18:00. Battery life without power saving mode except last 3 minutes: 20:07 h.
Battery charged: 52% at 18:12. Charge with Power saving mode, then deactivated.
Conclusion: 49% within 0:43 h.

02.10.: Battery charge at Anker PowerCore Slim to 52% (iOS version 11.0.1)
Battery still has: 31% at 19:28. Battery life without power saving mode: 25:16 h.
Battery charged: 80% at 20:11. Charging without energy saving mode.
Conclusion: 49% within 0:43 h.

02.10.: Battery charge at Anker PowerCore Edge 20000 mAh to 92% (iOS version 11.0.1)
Battery still has: 33% at 23:45. Battery life without power saving mode: 3:34 h.
Battery charged: 92% at 00:44. Charging with energy saving mode.
Conclusion: 59% within 0:59 h.

03.10.: Battery charge at Apple 5W USB Power Adapter to 80% (iOS version 11.0.1)
Battery still has: 33% at 19:51. Battery life without power saving mode: 19:07 h.
Battery charged: 80% at 20:45. Charging with energy saving mode.
Conclusion: 47% within 0:54 h.

04.10.: Battery charge at Anker 36W 5V/7.2A 4-port USB charger to 77% (iOS version 11.0.2)
Battery still has: 67% at 12:54. Battery life without power saving mode: 16:09 h.
Battery charged: 77% at 13:06. Charging without energy saving mode.
Conclusion: 10% within 0:12 h.

05.10.: Battery charge at Anker 36W 5V/7.2A 4-port USB charger to 85 % (iOS version 11.0.2)
Battery still has: 31 % at 11:53. Battery life without power saving mode: 22:47 h.
Battery charged: 85 % at 12:41. Charging without energy saving mode.
Conclusion: 54 % within 0:48 h.

This record will be expanded later this month.

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