Saturday, August 02, 2008 - 11:20 am, by: Ben Lipman(Ben12a)
No.
I leave mine for upto 6 months at a time. As long as the thing is in good working order and has no 'voltage leaks' you should be A-OK.
When I was in Darwin I was a bit more careful, due to the high heat and evaporating battery fluid problems. I still left it for up to two months at a time up there with no issues.
For me not having the alarm on whilst I'm away (which is a lot) is more of a concern.