Have been using CPU Master Pro to underclock with the smartass V2 gov and noop I/O, max 480, min 122. This did help increase battery life a bit.
A couple of days back came across this script on xda so just wanted to share...I apologize if this is not the thread where i should be sharing the following -
Would suggest Ace users to check it out yourself and then take a call whether it improves battery life or not. My Ace rarely lasted over 6-7 hours without a recharge (mid to heavy usage - wifi, calls, surfing, chatting, music, youtube, etc.). With this script by PureMotive, the first day i got more than 16 hours with the same mid to heavy usage and there was still some battery to go...
Am using Itasoulos GREAT Miracle V3 ROM with the Ace Kernel beta3.1 and the puremotive script. Somehow, this combination is working to increase not only battery life but overall phone performance as well. dont go by the comments on puremotive script thread...check it out for yourself...it has done wonders for my ace....but i feel it is more the combination of V3, the ace kernel OC and the battery script...
Miracle V3 link - http://forum.xda-developers.com/show....php?t=1583871
The Ace Kernel OC link - http://forum.xda-developers.com/show....php?t=1606352
PureMotive Script - http://forum.xda-developers.com/show....php?t=1622882
A BIG THANK YOU to all the DEVs and MODs for the great work that you guys are doing to make the ace a better device overall.
Peace, Love, Respect