i need a good affordable battery

I would try walmart or sears or autozone. Sometimes sears does online discounts or cupons on their batteries.

PepBoys.com has a 20% off on orders over $100 with promo code online. Order and then drive in and have them install. It's 30% on orders over $150

Don't buy cheap Walmart or Autozone batteries. They are junk. I replace more of them than any other brand. When it comes to electrical and electronics you get what you pay for. If you plan to keep your truck for more than a year step up and buy a good battery. Interstate, Sears Die hard, NAPA ect.

Annette: Unless you have a very good friend who is willing to come and get you somewhere in the middle of the night, in the middle of nowhere, I would not purchase a cheap-o battery. The difference between a bargain battery and a good one is not that much. Getting stranded once makes up for the difference.