For that reason alone is why i do not use smart switch and always set up each phone as a new one bar for the following. Contacts/messages/emails. other than that its all new, i thenm also re download apps i regularly use thus avoids downloading apps i have tried but never bothered to uninstall.
I also came from a note 9. the battery isn't as good granted but then it takes a while to get the battery and the management sorted. and remember the note series had a few battery optimisations baked into some of the updates. we will be getting some for the s20 range im sure.
EDIT also remember how fast the s20 range now charges back up. a lot faster than previous versions.
Ah ok, ill have to do a reset / fresh install again then in the next few days. Hopefully that does the trick as i cant carry on with this woeful battery life, even though the fast charging is great.