The battery is in the driver's front fender in front of the wheel. It is directly below where the (+) and (-) terminals are in your engine bay. You will need to remove the wheel and the wheel cover to access it.
pretty much the battery in a dodge stratus is used for starting and to complete the charging circuit. this is same in any vehicle
Unhook the battery.
you open the hood and put it in
it all depends on what kind of battery you want but their not expensive
Connect a battery charger to battery positive to positive negative to negative
On the top of the battery look in the engine compartment directly above the battery.
Scan tool or unhook the battery
behind the drivers front wheel.
in front of the driver side tire
Remove the battery and have it load tested at anyplace that sells batteries.
left front fender, in front of tire
It is mounted on the engine and connected to the battery.