Question: Severe battery drain after IOS update to 12.1.2
Since this update the battery usage on my iPhone 6s has escalated to the point where it is down to 12% after only 78 minutes of battery usage by the apps during the day.
I always charge the phone fully at night before going to bed and the phone is set to Do not Disturb for 7 hours. After this time the battery is now down to 74% whereas before the update it would usually be down to 96%.
Also before this update, normal usage during the day using either Wi-fi or fast 4G never drained the battery lower than 70%.
Battery Health is showing maximum capacity of 100% and the Peak Performance Capability states the battery is currently supporting normal peak performance.
I have not updated my iPad Air2 with this latest update and the battery performance is still more than satisfactory. The apps on the iPad are identical to the iPhone 6s.
I can only surmise that something in this iOS 12.1.2 update is causing the battery problems with the iPhone.