try deleting specific entry there

I confirm, in my past experience with a Jolla 1, Android has always been the most awefull power-hungry explanation of battery drop.

Worst offenders seemed to be online chat application.

I've mitigiated by :

• Switching Facebook, Messenger and Skype, to Facebook Lite, Messenger Lite and Skype Lite (that last one might not be available on the Play Store in your territory, you might need to get it from apkmirror). Saddly no such thing as official WhatsApp Lite, yet.
• in Settings -> Apps -> turn off background alert on any app that I don't explicitely need.
• replace as many application with native apps (e.g: my sports tracker is MeeRun).
• when not needed (e.g.: when I don't need to receive WhatsApp messages), shut down alien-dalvik (you can even add a toggle switch on the notification pane using a plugin from CoDeRus)

That has *tremendously* helped both battery life and memory/swap pressure.

I haven't installed enough (bovine manures) on the Xperia X to be affected by battery problems.

Does XT9 auto-suggestion send anything to internet?

My bad.
It is not paired, but listed all the time as a nearby device. And cannot be removed from the list using long press.
And when trying to pair, it will be rejected by car bt, as incorrect (if any) PIN is given.
It was the same case with AquaFish, but with many trials I finally managed to pair, also yesterday when tested. It was managed when phone found the car bt while searching, not when it already was listed as nearby device.

2.1.3.7 is available.

Changes?

Hopefully Tethering is working

Maybe also the volume settings are fixed.