friend as my personal exp there is no major power saving option in this rom as i would suggest u to instal 2058 rom and dont use facebok messsenger without charger it will save ur lots of power n even u will get all features, coz powersave rom didnt had some application which consumes battery, so ist power saving but if u install thos things its battery killer rom, now m using 2058 and it lasts 1 day full means 12 to 14 hrs, but powersaving rom with same applications it was just 6 hrs max, i understood things that consume battery and i dont use them i use gtalk etc n for face book i use with charger, rest is ur decision