I made one change that has made all the difference: Turned mobile data off (I keep 4G off by default). Right now I'm at 77% after 30 hours off the charger with normal (for me) usage. Not rooted. Occasional texts and calls. Light browsing. I turn on data to check e-mail. I use wifi at home. It's just my personal e-mail so I don't need to get them immediately. For others, particularly those who need to receive business e-mails right away, this will not be a good solution. I am completely blown away by this. With the same usage as above, but keeping data always on, I'd get around 28-32 hours from a full charge.