The battery that was installed in my DRZ is not OEM, and I don't really trust it for a trip I'm taking pretty soon. I think a gel / AGM type battery is a good investment. Should I get the stock replacement size, or is the Happy-Trail upgraded battery box for a larger battery worth the investment. It's $50, plus a larger battery. My DRZ is set up for adventure touring, nothing too extreme as far as single track or motocross. I am looking for the most reliable option, but is going with a larger battery going to add too much weight? Thanks for any info, Ryan HT battery box : http://www.happy-trail.com/DRZ400S/Battery-Box-DRZ400S-All-Years.aspx I did a search, but didn't find anything specific.