I had problems with massive quantities of Google, Sony, and T-Mobile shovelware draining the battery. Disabling them is trial and error. The best start is to disable apps showing up in your bandwidth usage report that you don't use. Those are keeping the phone awake to sync data. Google's extremely aggressive data syncing (spyware) is the worst offender. There's Chrome, "Back up my data", "Collect Diagnostics", location service, Google Calendar Sync, Google Contact Sync, GMail, and more. After that, go after apps that will only function if you sign up for pay services that you don't want. Go very slowly, maybe one app a day, so you know what to re-enable if features you use become disabled or crash. I'm now at 60% to 70% by the end of the day.
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