Hi,
>
> For the past 6 months, my car battery died about 5 times and needed a
> boost to recharge.
>
> What electronic upgrades do i have in my car: i have amps, subs and
> upgrade speakers. The alternator is stock, and the battery is an
> interstate one - all items replaced about 3.5 yrs ago. No capacitors. >
> Symptons:
> b. On most of the occassions, it died while i was idling in traffic
> because of traffic jam, or died while in the drive through lane at Tim
> Hortons or McDonalds, and playing my stereo.
>
Sounds like your "system" is pulling more juice than the alt can produce... Someone with a volt meter can check to see if the system goes into negative charge with the system turned on at idle.