Chilidawg

I just had a 30,000 check up after my "check engine" light appeared. All
was well for a week until my battery just up and died on me. I had it
changed and now my car keeps dying out on me whenever I slow down at a
stop sign or when I'm turning a corner. The car just dies without any
warning and I'm forced to stop and restart the car in the middle of heavy
traffic (it does start up right away though so I'm thinking it's not a
battery issue anymore). Any ideas as to why this might be happening?
Alternator stuff?