I have a Sony Xperia Z running factory Android 5.1.1 I'd like to use in my car for navigation/ music.
I've installed Tasker & configured it to start Spotify playing on power & turn off Spotify when power is switched off.
However this still leaves the phone active & using it's battery while the car is not being used. We don't use our car that much so the battery runs flat over a couple of days.
What I'd really like to do is have Tasker shut down as much of the phone as possible - wireless, mobile data, location services. Ideally I'd like the phone doing absolutely nothing & waiting for power to start playing Spotify again.
Options for "Airplane Mode", "Mobile Data" & "Power Mode" are all unavailable/ red in Tasker. The phone is not rooted but am I correct that these aren't available in Android 5.1?
The Sony Xperia Z has got Ultra Stamina mode that would be perfect. But I can't work out how to activate Ultra Stamina via Tasker (I don't think it's possible) & the phone might need a reboot to come out of Ultra Stamina - which isn't great if I've just stopped the car/ turned off the phone for 5 minutes.
What is the best way to put the phone into "deep sleep" while the phone isn't receiving power where it uses as little services/ battery as possible in Tasker?