My wife and her ex-husband had purchased a sea doo while the were married and it's in my garage... I have very little experience with these, but now the weather's warming up and it's getting to be time to take it out again. I tried turning over last week for the first time since September and the battery is dead. Before I run out and buy either a charger or battery, I thought I could hook up the XK and jump it. Or will this fry the electronics?