I guess android apps like FB, WA and TG eat the battery - they didnt before, so Jolla has regressed in that matter. Maybe related to that, that IM-apps are not working in background, instead they have to open - not the right way. Maybe they have severe battery problems with these matters. *just speculating*
Battery drain seems almost entirely down to default browser / Alien Dalvik. If only there was an official WhatsApp app (or I could manage to convince my friends to use Telegram) - I'd be Dalvik-free forever.
I swear the browser wasn't always this resource heavy though. Thing gets hot when I have multiple tabs / YouTube videos open.
My battery is at 85% original calacity and when the charge drops to 30%, odds are about 3:1 that the phone will spontaneusly reboot. When it does, it remains in a boot loop until I put it on a charger or until the battery drains completely, which is usually about 5 minutes. U11 has nothing to do with it though.
You should try to clean the battery contacts. It looks like this fixed the shutdown and reboot issues for me completely. I cleaned the contacts two months ago and did not have a single shutdown or reboot since then.
I came back just to say thanks, cleaning the battery contacts has solved the above problem. I was a bit dubious to say the least since dirty contacts would IMO cause unexpected reboot independent of the battery level - but it does not cost anything to do that and the outcome is no unexpected reboots any more.
The only explanation I can come up with is that the dirt increases the contacts' resistance and this is demonstrated the most when the battery voltage is reduced.
Since a factory reset some weeks ago, silencing incoming calls by turning the device upside down doesn't work anymore. I have the last OS update. Any hint on how to repair/reinstall this?
- not the right way. Maybe they have severe battery problems with these matters. *just speculating*