Motorola Krave ZN4

I have that issue as well! I had no issues for the first month or so when I first got my Krave. But then I loaded the Mobile Email application and saw my battery get low after sitting on all night with an incoming email notification on the display. I sent an email to the app developer, Oz. They confirmed the issue was with the app but could not tell me when/if it was planned to be fixed. So for now I either make sure my phone is charged or turn it off at night.