12.1.2 battery drain

since 12.1.2 my battery drains from 100% to 20% in 1 hour without using the iPhone 6s. Charging takes a long time and after a hard reset, the iPhone indicates a longer battery percentage. After opening and immediate shutdown of an app , the percentage starts decreasing very fast. Reinstalling 12.1.2 gives the same problem.

iPhone 6s

Posted on Dec 20, 2018 12:30 AM

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Question marked as Top-ranking reply

Posted on Dec 20, 2018 5:14 AM

How is your battery health maximum capacity percentage?

Settings>Battery>Battery Health... and tap on it.


Check also what apps are using your battery.

Read this guide: Batteries - Maximizing Performance - Apple


Regards

Giulio



43 replies

Jan 15, 2019 2:19 AM in response to Tony4_

I charged to 100% last night then switched phone off. This morning I started it up, did a couple of things then, at 97%, turned it off again. An hour later I booted it up and it said 100%. Opened an app and the phone shut down. Rebooted it and battery was at 10%. Opened settings to check battery be phone shut down again. Rebooted: 10%. Shut it down and restarted it: battery at 96% and then carried on ok (but still draining fast, as per my original post).

I’d be tempted to believe it’s just the percentage indicator that’s wrong but the phone will be flat @ 5am, having been charged to 100% at midnight so that’s clearly not the case.

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12.1.2 battery drain

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