240sx car battery problem

[NoOneBetter]

My battery kept on dying and the battery is brand new. I checked the ground wiring and its fine. Could this be a bad alternator or starter?

[gumby]

if you havent driven it very much it might not have charged enough. i was having a similar problem with my battery before i started driving the car every day. id quick chargeit let it idle for 30 minutes and itd be dead the next day. it needed to sit on a 1-2 amp slow trickle charger for a full day. when the car is at idle thats all its getting 1-2 amps. besides the stock alternators are wimpy.