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Hello fellow Android Enthusiasts.

I have a problem that has been bugging me for a very long time: Whenever I leave devices at my workplace overnight, the battery is completely drained the next day.
This occurs on any Android device and any of those devices' batteries last completely normal in any other location. This is exceptionally strange with tablets which batteries last for weeks in standby mode.
The devices are not connected to anything over night via cables.

The only thing I can think of that is different between work and anywhere else is the WiFi.

Those are my devices that I could observe the behavior on:

  • Sony Xperia Compact Z5
  • Samsung Galaxy Tab S2
  • Google Pixel C
  • LGE Nexus 4
  • Google Nexus

The range of Android Versions goes from 5.1 to 7.1.1.

Can such a behavior be caused by the WiFi? I was thinking of connection loss and reconnection iterations. But I think I would have noticed such problems while being at work. Any other ideas out here?

  • While WiFi is turned on and no connection is available then the phone keeps on searching for a wireless connection. This certainly leads to draining of battery. – Chandrani Chatterjee Mar 29 '17 at 7:22
  • The WiFi at the workplace is up 24/7. Also I never switch WiFi off on my phone when walking around outside and it never drains the battery as extreme as it does it at work. – McFarlane Mar 29 '17 at 7:38
  • Is there a single WiFi connection available at your workplace or multiple? – Chandrani Chatterjee Mar 29 '17 at 7:43
  • There are plenty of WiFi. But there are also plenty of WiFi at home where the battery-life is normal. – McFarlane Mar 29 '17 at 7:57
  • 2
    I will experiment with the suggestions of 1 and 2. I don't think that synchronization is the key here since it does this at home, as well. I will reply once I've testet it, which may take at least a day. – McFarlane Mar 29 '17 at 9:03

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