Given that this unit's about five years old, its understandable that its battery no longer holds a charge. My question is if its safe to keep it in the unit while its on or not.
Its like, once i turn the unit on, it indicates that its charging the battery... then a few seconds after, the charging led just turns off by itself.
Is this normal? Expected of a dying battery?
			
			
			
				I've have had this problem twice, each about a year apart.  Yes, a new battery solved the problem each time.
However, it has happened again recently.  A "new" battery this time did not solve the problem.  There is no way to tell if the battery I bought is indeed new, so I can't be 100% its not still a battery issue.  I plan to exchange the battery for another and see what happens.
FYI while the battery is in, the charger plug gets VERY hot.  If I wiggle the plug, sometimes the orange charging light will come on for a short time.  Then it flickers while making a high pitched noise.   I have 2 different power adaptors, 1 with a slightly longer plug than the other.  The longer tip plug is easier to get a charge started now.  I suspect a damaged internal plug.
You can buy a battery on e-bay for about $50.  Search using the "Replace" code printed on the battery.