Quote Originally Posted by DBMandrake View Post
What do you mean lasted ? Lasted until the periodic warning beep started ?

Or until the full screen warning message appeared ?

Or until the unit died completely ?

The warning beep will start in about 30 minutes to an hour but the device should function for many hours after it starts beeping.
Started beeping after about 30 mins then battery low appeared shortly after. Completely blank after a total of 40 mins.