i took my car for a battery change,n now my car will start but wont hold an idle on 2002 Lexus ES300

so my car shut off every time i turn it on.

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2 answers
Jumpstart vehicle from another car. If it holds and continues to run, remove jumper cables and let vehicle idle for a few minutes. If the alternator is bad, it will "stall out" during this period.
See answer 3 on your other posted question!