I bought the car about a year and a half ago. I hadnt had any problems with it starting up or anything really until i had a radio and small system installed. Then all of a sudden it started having problems turning on. I had to jump it every day until I finally put the stock radio back on and took out the amp and sub and bought a new battery. It worked fine up until now. My girlfriend left her the car charger to her phone in it overnight and it's starting to have trouble again. So im thinking the altenator is not keeping the battery charged anymore. And I dont think a brand new battery would have gone out in 9 months. I have to jump it everytime I leave it off for a while. As soon as i put the cables on it will start..so wat do you guys think? Time for a new altenator?