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Yeah the light come on as I was driving sir. It's going to be the alternator for sure and it should cost you around 200-500 depending where you can take it. The part itself is just like 200 bucks and then labor!!!
Let me know what happens sorry I took way too long to reply didn't realized I had a notification, my apologies.
one more thing, you can take your car to autozone to check your alternator and they'll do it for free and make sure that is your problem.