Sounds like a dead battery again. So have you not started the bike in the last 3 weeks? If not it would make me think that there is some parasitic drain happening.
What mods have been done to the bike that you know of? Most likely it would be some aftermarket system that is the cause.
Thanks! I will try jump starting tomorrow.
I haven't done any mods. I have no idea why it would die like that... Even without the battery tender, it should last 3 weeks on a brand new battery.