iPhone 6s Battery Draining Fast with iOS 12.1 /12.1.3/ 12.2 update [Fix]


Many iPhone 6s /SE user are facing fast battery drain after update to iOS 12.1 & 12.1.3. The battery drain in iPhone 6s on iOS 12 started to happened just after the update and battery is drain really fast and sudden for some iPhone users.

Battery drain in iPhone 6s is really fast right after 12.1/12.1.1 update and it was never the case with iOS 11 or iOS 12. The battery drain really like it went from 68 % to 44 % within 10 minutes viz is like 1% drop in battery in one minutes in the iPhone 6s.

iOS 12.1 battery drain in iPhone 6s

Even when tested with minimal usage/standalone the battery is still going down really fast like 30% in just one hour on iPhone 6s. Before the update the battery easily lasted 1 - 1.5 days with usage. When checked the battery looks fine and  ~90% to normal peak performance according to the battery stats function. Normal restart or low power mode is also not saving battery drain in iPhone 6s.

Why battery is draining fast in iPhone 6s on iOS 12.1/12.2 :

When observed closely it seem like this is not a battery/hardware fault that is causing server battery drain in iPhone 6s/iOS 12.1 but battery drain is a software glitch that is not showing the battery percentage accurately. Due to this bug the battery initially will not show any drain for long time, or may increase in percentage without charging. But after some times it will move to actual percentage randomly making it look as very fast or sudden drain of battery in iPhone 6s/iOS 12.1.

How to fix Battery drain iPhone 6s/5s/SE and iOS 12.1/iOS 12.2:

Fix 1 : Reinstall the iOS 12.1 update

*Please make sure to take iPhone backup before doing restore
The battery software glitch could be due to improper installation/up gradation to iOS 12.1. And in order to fix that you should reinstall the iOS 12.1 as fresh.
You need to setup the iPhone as new, reinstalled everything from scratch and once you have done that everything should start to work normally.
To know how to reset/restore iPhone go to below link:

Fix 2 : Location and Background Location. 

In setting you can check  which app is using location services.
  • You can optimize your battery life by turning off Location Services for the app in iphone. Turn off in Settings > Privacy > Location Services.
  • In Location Services settings , you can see each app listed with its permission setting. Apps that recently used location services have an indicator next to the on/off switch.

Fix 3: background activity

There can be apps that are putting you iPhone busy doing work constantly and causing it to exhaust battery of iPhone. To improve battery life, you can turn off the feature that allows apps to refresh in the background. Go to Settings -> General -> Background App Refresh and select Wi-Fi, Wi-Fi & Cellular Data, or Off to turn off Background App Refresh .
Mail apps are usually the most battery consumer, If the Mail app lists Background Activity, you can choose to fetch data manually or increase the fetch interval. Go to Settings > Accounts & Passwords > Fetch New Data.

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