Hello! I have a 2000 Chevy Blazer that will I have been having trouble with starting. When I jump it, it starts and runs fine, the volts meter reads in the middle. When I shut the blazer off it will not start it has power but all I get is a lot of clicking, I have had it on a battery charger for 5 hours now and it is taking the charge, all lights, windows, radio etc work, but it just clicks when I try to start. Any ideas???