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2017-08-30 01:29 PM
I had no problems on Android 5.0 or 6.0 but after upgrading to 7.0 I started to development massive bluetooth battery drain - 80 to 90% or more of the battery usage used by bluetooth.
Whilst on 7.0 I did a factory reset. The issue went away immediately but then gradually came back again.
I've since upgraded to 7.1 latest version but the issue remains.
I use my tablet mostly as a work terminal via Citrix with the BKB50 keyboard and a bluetooth mouse so I leave bluetooth on all the time as I often need to use it. I turn both the keyboard and mouse off when not using them so bluetooth stays enabled on the tablet but not being used by any bluetooth devices.
See screenshot below..
2017-09-01 08:22 AM
Exactly same problem with my tablet. Even when not in use, if the bluetooth is turned on then it contributes to >95% of battery drain. It is draining twice as fast too.
Would welcome any updates on how to fix this
2017-09-04 08:27 PM
Same problem with my Z4 Tablet. I use the original sony keyboard BKB50. I am waiting also for a fix.
2017-09-13 09:19 AM
have you all tried to perform software repair using Xperia Companion?
after the repair. do not install any apps yet, and try to observe the bluetooth performance
2017-09-15 06:22 PM
Thanks for the tip, haven't tried that.
Does it work differently from factory resetting from the device itself?
2017-11-07 10:14 PM
okay so I've wiped the tablet using the Sony Companion software and installed the latest version fresh.
Surprise surprise, Bluetooth battery drain is back.
Can anyone offer any suggestions?
2017-12-27 06:31 PM
Same problem here. Bluetooth draining full battery in a matter of hours! Has anyone found a fix for this?