Hate to break it to you but as long as the battery posts can be connected to the Power and Ground leads, the electron flows the same whether it be a Limited, Base or SRT. Get what battery fits, I believe size group 84?? Could be wrong on that. Mileage doesn't really matter on the car, install date however does. If you put a new battery in and it still doesn't start could possibly be the starter. Have someone turn the key to start and take a long prybar and smack the side of the starter. If it starts, then the starter is to blame.

Another thing, have the alternator load tested. As a battery gets weak, the alternator is strained weakening it as well when it tries to overcompensate for the bad batt. Take a Voltmeter (DMM) and attach the leads to the battery while engine running and set the multimeter to AC, not DC. You should read <0.3VAC, this will tell you whether the rectifier bridge within the alternator is working. If you see 4V, 8V, or 12V (Car wont's start/run) then you know those diodes inside are bad.Rebuilding an alternator is easy, time consuming, but easy DIY. Usually alternators are R&R items though, because of parts warranties in place.