Put a load on it periodically, like a headlight bulb, run it down about halfway, and recharge. Be sure to monitor the acid level at least once a month while it's on the charger, and add clean water (never acid) to keep the liquid above the top of the plates.
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!