a little history 2003 Honda Element bought used about a year ago. Car alway started kinda sluggish but would start. after a couple months the battery would die, I'd charge battery the it would be ok for a couple weeks then die again. I bought a new battery fine for a week then the same thing started again. I took battery back had it replaced and it was fine for about 6 months then today I went to use car and battery was dead again, or so it seems. I put the charger on at 9 this morning and just now at 5pm went to see if it would start and NOTHING no clic cli clic nothing.BUT the battery seems to have a full charge. Lights are bright, they don't dim when I turn key something weird going on. meter says battery at 13.6 so any idea's