Alt charge/battery power question please help! :)

[dbslayerdrake]

Okay so even in my head this sounds like such a n00b question but I keep getting conflicting answers when I try to research it. If I have a 320a alternator and 3 d3100's (110ah each = 330a) will the batteries eventually drain because they exceed the output of the alt or am I not quite getting EXACTLY how alternators charge you car's batteries. Any help is appreciated.

[jrchevy87]

the only way they will drain is if you pull amps faster than your alt can charge you batteries, trickle chargers put like 5 amps into a 700 or 800 amp batt and it charges it just takes forever lol