I actually needed a new battery about a month ago to be honest. Lucy didn't even want to start a few times, I was upset. I will forewarn you, the cheapest places I found for a new battery were either Interstate battery for $115 and NTB for $132 with tax. I believe Cricket is an R56, right? If so, you don't need a reset code. My radio presets stayed fine, the only thing I needed to adjust was the date and time because it went all wonky on me in the first place since my battery wouldn't hold a charge. It's really simple to change the battery but we found that since it's in that funky plastic housing, in order to put the housing back on and make it look all pretty, it was easiest to take off the passenger side windshield wiper. Let me know if you need help and I can help you out!