Since the latest firmware update, my launch 3G+Wifi Vita 1000 has been draining to empty in a matter of hours, even in standby.
Before the update I would have 3-5 days at least of standby, certainly more than the 6 hours between my morning commute and now 
Along with all of the other problems with this update (No PSN Store access, etc) I hope Sony spits out a fix ASAP.