If you are having unusually heavy battery drain after the 4.4.2 update check you cpu governor and minmum frequency.
I have found on a couple of roms, this to be true. The governor is interactive and the minimum frequency is set to approx. 1700mhz and the maximum at 1900mhz.
A solution to the heavy drain is to drop the minimum frequency to 300mhz for example. And this should help .
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