I upgraded to 4.7.0.148 from 4.7.0.75 just a few days ago.  I used to get a day to a day and a half of battery power.  After the upgrade I have about 6 hours of battery power before a fully charged phone is completely drained.  That's with minimal use and the phone holstered as well.  It's unusable at this point so have no choice but to go back to .75.  It may be a good release for some but it's unuseable on my phone.