If it freezes, which it probably will unless it's recharged occasionally, it will get damage to the plates and separators inside the cell groups. I saw one battery that sat in a junk farm tractor for over a year in all sorts of weather and still had enough power to crank the engine, but it was definitely the exception to the rule.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!