Just make sure if it is the alternator(have it tested at a shop, usually free of charge) make sure you get a new alternator instead of a rebuild. ANd try avoiding draing the good battery. Its bad enough the alternator is going out, no need to buy an extra battery.
"I call suffering my brother. I love him like my mother. We look out for each other, we'd die for one another.
I fight, I brawl, I feind for this. I scrape, I crawl, I bleed for this.."