Dead Battery

[txtimberwolf]

I went out this morning to take a nice long ride to work today and noticed that someone (my 7 year old had turned my key on and left it on. Now I have a dead battery. I know what your thinking why did i leave the key in. Well i have little chance of someone trying to take it since they would have to get past the 2 trucks in the driveway and Max the Bull Mastiff, then in the garage and worm it out through all the odds and ends.
So my battery is dead as a door nail. i put the charger on it and after about 3 minutes it gives me a reading F01 meaning bad cell or overload during charging. I decide to try to jump it off with the truck.
I hooked up the jumper cables. Let charge a few minutes turn on the switch hit the starter button. It turns over and over and over but will not start.
It has been my experience with bikes in the past that I had to jump when you hook up the cables they have all fired up and ran.
This is the first one that has not started when jumped. Is there something I am missing or is it just the battery ??
Any ideas would be great before I go buy a $100 battery