Found a dead Spyder in my garage

I'll be returning from a two month trip this weekend and my wife tells me that the spyder won't turn over (she wasn't driving it weekly like I'd asked). So....I'm wondering what to expect when I get home. I have a battery charger but, is there anything that I need to do to make sure I don't create any electrical system problems? Should I remove the battery first? What will I need to do when I put the battery back in?

Thanks!