After 4.1.2 update you can really drain your battery with new background service. After a reboot, I always go into app management and stop all the processes. Those never restart back, phone is running perfect (thus no need for that background stuff anyway), and battery drain significantly lower.
As of now, had my Anker 3100 for 1d 2hr with light use (phone calls through bt and checking emails) and its at 58%.
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