Tablet's battery performance is VERY poor. If I leave it on WiFi doing nothing, by the end of the day is dead.
Either is my battery or there's no optimisation whatsoever.

Anyone having similar issue or has patches to improve situation?

My idea was to get rid of all Apple related hw from my life (Lumia 950XL instead of iPhone 6, Lenovo X1 Carbon instead of Macbook Pro 13, Jolla Tablet instead of iPad mini), but so far the last step is not happening...
The Mini is charged ONCE a week and I use it every morning/evening, the Jolla Tablet is charged EVERY night and so far I barely use it.