My Sony Xperia Neo V battery performance has gone down very badly after upgrading to ICS.
It mainly happens when I have my mobile data/internet turned on. How can I improve the battery performance?
Well you can try managing battery life with JuiceDefender, which does a great job at disconnecting data connections when not needed and turning it back on when needed. I can personally attest to this fact although I use gingerbread on my Xperia Neo V. Give it a shot and see