sounds to me like a bad cell in the battery has killed it. I know from experience...I went through a couple batteries in a few month period that ended up like this. check your amp draw when the bike is not running...there shouldnt be any. If there is, you have to find the problem. If not, buy a new battery and ride away.

Best looking black girl around! 2004 SM-spokes, solo seat, lowered rear, 14 in apes, bobber rear fender, no front fender. Flat black all the way around. Jeff