BatteriesPlus review: Battery lasted one week and there was no warranty

I brought the key fob for my 2006 Chrysler 300 in to get the battery replaced. No problem. They offered a one time replacement or a lifetime replacement cost. Since I've never had to replace the battery in the almost 20 years I've had the car, I figured the one time replacement would do, as I don't expect to keep it for another 20 years. He replaced the battery in the fob in just a few minutes, and it worked perfectly. For about a week. Stopped by the store on South Florida Ave here in Lakeland Fl on my way home from work today and asked if the wasrranty would cover a replacement if their battery only lasted a week. The young man behind the counter said that if you only buy the one time replacement, there is no warranty. I'll never use these people again.