[iPad Air 2] High battery drain in standby and airplane mode
5 weeks ago I've got my new iPad Air 2. It's the 128GB WiFi+Cellular version but no SIM card installed yet (I told Siri to turn off mobile data). iOS 8.1.2 already installed. First everything seems fine until I saw how much the battery drains while I'm not using the ipad.
I have disabled almost everything I've found as possible solutions to avoid battery drain with iOS 8...
- Bluetooth off
- mobile data off
- Brightness almost completely left (15-20%)
- auto brightness off
- automatic app updates off
- background updates off
- location services only enabled for find my iPad
- all iCloud services disabled ecxept iCloud backup, keychain, reminders, calendar, find my iphone
Installed apps (additionally to the default Apple Apps): GMail, Youtube, Facebook, Amazon, ebay, dropbox, TV Sideview, brother iPrint&scan. Push notifications only enabled for GMail, ebay and facebook and the default Apple Apps Reminders, Calendar, Messages (iMessage on or off is no difference to battery behaviour), Facetime.
I'm using the iPad mostly for surfing the web using Safari. So this is the app with high battery usage, which can be found in the settings.
I can barely reach 6-8 hours of usage and 1-2 days of standby until it runs out of battery and I have to charge it again.
Before I go to sleep or leaving home for work, I can either enable airplane mode or not, the battery will drain up to 20% (mostly 10%-18% in airplane mode within 7 or 10 hours). I've already set it up as a new ipad four times but there is no change.
I called Apple Care Support and send a diagnostics but this says the battery is fine. I could believe that and last week the iPad turns off by itself at 12% battery left. So I called Apple again and send the iPad to service center. UPS picked it up on Monday and sent it from Germany to Apple service center in Netherlands, where it arrived on Tuesday 11:30 and was already returned at 18:00 to Hermes. They restored it and found no errors but I think in this short time they could not check the battery behaviour accurately. So I received my original iPad back on Wednesday, turned on and left with 95% battery - all options enabled except bluetooth. I connected to my WiFi, logged in with my iCloud account and installed the apps mentioned above I turned of the mentioned settings and used the iPad until 58% (some short standby minutes) and turned WiFi off, turned airplane mode on and this morning, only 48% battery left.
What is wrong with my iPad?
iPad Air 2 WiFi, Cellular, iOS 8.1.1