theres a stereo but its only a mini disc head unit, nothin special no amps or anything, i noticed i got a gps box in the boot too, never knew it was in there till yesterday lol i cant see that using much though, the alarm system only has a few leds on the dash which would use hardly any power to run, im just trying to get me head around what could be draining it, i ended up roll starting it yesterday let it run for a bit then killed it then it started fine again after that so it seems the alternator is alright