hi, i have an 06 vauxhall vectra c est that has an odd problem, car runs fine no battery probs etc, then every few days it will just not turn over, like a flat battery , just a clicking sound, but there is power everywhere, it used to start after a few turns of the key, but now when it happens it just wont start or turn overt at all, had it jumped from leads and started fine and today i had it pushed and jumped it ok , confusing me as ive checked the battery connections and battery earth etc, any ideas??? hopefully nothing major!!