[Mattlock18]

My battery has not been giving any juice after sitting for a either long or short periods. I have a portable jump starter that has been getting a lot of use lately. I had the local shop hook the battery up to its tester and they say it is a good battery (it's only a year old)

I just had an alarm installed and am wondering if they geniuses at Circuit City left something draining the battery when not in use or if I need to look at the alternator. I'm not getting any warning lights or anything on the dash. Any thoughts?