Samsung Galaxy s4 gt i9505 lollipop update

Finally it arrived by OTA.
Installed OK, reinstalled all data/apps using backup my mobile.
Not good.
A
Very Laggy and poor battery life (6hrs)!

In the end I gave up and decided to do a factory reset.

Only loaded data this time and left apps out.

Voila lag has gone.  Battery life now awesome.

Recommend Gsambattery monitor for some solid data.

So if you have issues, don't be afraid to discuss them.