Google Services battery drain
In general this is a well-documented problem, but it hit my DNA only after the most recent OTA. I am surprised no one brought this up here.
If you enable Google Location Services in settings, Google Services will proceed to initiate hundreds of wake locks and turn the GPS on for something like 15 minutes per day, resulting in much downgraded battery life. It will do it regardless of whether you use Google Now or anything else for that matter. Basically it appears Google has decided to keep track of the phone's location on a minute by minute basis as a default option.
The way to turn this off is to disable Google Location Services under Settings - Location and by setting to "off" Google apps location access in Settings - Accounts & Sync - Google - Location Settings. As far as I know this also kills Google Now and your location in Google Maps.
However, to use Google Maps only occasionally, I am not willing to pay the price of a permanently crappy battery life and be subject of so much spying.
If you are rooted there is a way to turn the location services on automatically with Tasker when you run Maps. I am on un-rooted stock, so that doesn't work for me. Another option is to use MapQuest or any other third party maps app.
Any other ideas / suggestions are welcome.
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