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iPhone iOS 13.6 battery draining fast for no obvious reason? Try this fix


Over the weekend, a reader, Keith, got in touch with me with what is these days with a common problem — rapid battery drain. And this was really rapid. So fast that a fully-charged iPhone drained almost completely overnight doing pretty much nothing.

Take a look at this scary screenshot showing the battery drain over a few hours.

Overnight iPhone battery drain - pre-fix

Overnight iPhone battery drain – pre-fix

That’s some scary usage. It seems this problem had been ongoing for a while, and the reader had already upgraded, without any relief, to iOS 13.6.

This was one of those interesting yet annoying problems because iOS didn’t offer much in the way of insight into what was going on. The battery was in OK condition, and there wasn’t any sign that an app had gone rogue and was doing donuts in the background.

What do you do in this situation?

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The reader decided to try something — carry out a reset of the iPhones settings (Settings > General > Reset All Settings). This is not the complete nuclear option of wiping the whole handset and starting from scratch, but it’s still quite a reset.


Here’s Apple’s description of what it does:

Reset All Settings: All settings—including network settings, the keyboard dictionary, the Home screen layout, location settings, privacy settings, and Apple Pay cards—are removed or reset to their defaults. No data or media are deleted.

Did it work?


Here’s a screenshot showing battery performance overnight following the wipe showing that the iPhone lost some 1 percent overnight.

Overnight iPhone battery drain - post-fix

Overnight iPhone battery drain – post-fix

What’s going on here? It’s hard to say, but a likely culprit is a network or Bluetooth setting gone bad.

Another similar fix I’ve come across is to do a full reset and then recovery from a backup.

If you’re suffering poor battery performance, it’s worth a try.

Must read: Bad iPhone battery life? Here’s how to diagnose and fix battery drain issues

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About admin

I'm a 50 year old PLC programmer from Burnley, UK. I severed my time as an electrician in the baking industry and soon got involved with the up and coming technology of PLC's. Initially this was all based in the Uk but as the years went by I have gradually worked my way around the globe. At first it was mainly Mitsubishi with a bit of Modicon thrown in but these days the industry leaders seem to be the Allen Bradley range of PLC and HMI’s.

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