I have a 2007 C50. I charged the battery with a trickle charger. It started up but after running for about 15-20 minutes it shut off. I re-connected the trickle charger and let it charge all week. I tried to start it again and when I turned the key, all lights came on and then when I went to turn the key to start the bike, as soon as I did, I lost all lights and the bike was completely dead. It never even tried to start it was like hitting a light switch, everything just turned off. Any ideas would be greatly appreciated.