I Have A 2001 Dodge Stratus. After Changing The Battery The Car Will Not Stay Idling. What Do I Need To Do To Fix This?

Battery voltage should be around 14.5+Volts while
engine is running so check the alternator output, by checking the battery
terminals with the engine running with a volt meter to see if you have at
least 13.5+volts. I think the battery is week or there is some problem
with the alternator. You should go to the workshop to check it.

Take the positive terminal off for about 10 minutes then put back on

Check the alternator for 14.5 volts with a volt meter while its running