FE/FC FE350 Draining Battery

I'm thinking I may just have a bad battery. If it sits more than a week it's dead, not cold stone dead but jut enough to turn it over 4 or 5times and that's it. Over the winter I was tossing it on the tender twice a month to keep it up. Tried starting it yesterday after sitting 4days off the tender and it tried for a min and died. I unhooked p & n cables from the bike, charged it, hooked it back up and the bike started instantly. My buddies 450xcw sat beside mine for the last month no tender and it fired right up (stock battery).

Mine was the same way. I picked it up from the dealer on a Friday, got it home and rode it around the block once. Went to break it in on Saturday, and the battery was dead as a door nail.
Actually looking for a highly rated replacement. Any ideas?

I'm picking up a WPS featherweight lithium battery this week to try. All the guys from the dealer run them and have no complaints so I guess its worth a try.