Enzonov, try prying off the back (just pops off easy.) and hitting the reset button. I think that's part of the battery not reporting right levels. It's done that to me before.. But I didn't know much about the reset button fixing the levels at the time.
My own newest bug...
When I start my vox up the status bar nor the lock screen starts up. It sometimes works fine like the, other times it'll freeze and I'll need to hard boot.
Oh and it doesn't go to sleep on it's own anymore. Not much of a complaint since I suffer from sleep of death but..