Re: What battery should I buy?
Some chargers will not let you charge different kinds of batteries. Read your charger manual and go from there. If your power requirements have increased since your last set was installed, you might want to add some amp hours; if not, then don't bother.
"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.