I just posted this in the other Battery Life Thread. See below, gservicefix is the real deal!
"I installed gservicefix yesterday and the result is unbelievable. Battery life is now not back to 8.0 level but WAY BETTER. Not enough time to fully assess the change but so far the drain is extremely slow. I followed the instructions for the app once and it worked (apparently some do it up to 3 times).
Small rant: Some people are saying that this can't work, that its a 4 year old app, not updated or something like that. My opinion is this, battery drain in MANY (not all but many) Android phones over time is well known. I think gservicefix addresses the root cause of Android battery drain which really hasn't changed in the past 5-6 years. Overnight or idle drain was always a problem for Android.
Hardware has changed dramatically, software appearance has changed a lot but current core functions of Android are similar to those in the past.
gservicefix works, period. No need to update or change something that works well and this app is proof!. If it starts to act up or the drain reappears I will update this post but for now count me as a fan."