I too have had significant battery loss after the KitKat update. I have performed 2 factory resets; 1st one just did within the Settings=> Reset=> Factory Data Reset. Did not help. 2nd did the alternate method. Before alternate method, I had Verizon send me a new SIM card, turned off restoring my apps, so nothing would automatically come back. Ran without any apps (okay, one...WordFeud..lol). No improvement. In fact, before KitKat, the phone would go to sleep at night at whatever percentage it was, and only go down about 2-3 percentage points by the a.m. After KitKat, I would wake up and phone is dead. Just woke up this morning, dead again. Been using the phone about 15 minutes...down 10%! ! ! Called Verizon for replacement. Sigh. Good luck with me on the replacement. G2 has been my favorite phone.
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