Android 4.2.2 battery bug

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http://forums.androidcentral.com – I put my Nexus 4 on charge over night, as usual. I woke up with 100% battery, obviously, drained the battery down to 75% and thought I'd put it back on charge to keep it topped up. As soon as I put it on it said it was fully charged, even though it couldn't have been. So I took it off charge and started using it a little while later when suddenly it told me my battery was 34% it just dropped straight down? I'm charging it now and it seems to be functioning normally at the moment. Anyone else had this problem? Also I've looked at the battery on my Nexus 7 and it's been at 34% a few times, it co (HowTos)