Q: Q: Battery light is on

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While I was driving the battery light turned on and my cluster lights turned off when i accelerated the car also the gauges went down, as i begun to slow down and come to a stop it would turn back on. The next morning the car would start at all, i couldn't even unlock it with the key button. I got a brand new battery after getting the old one tested because the old battery didn't hold a charge, and the same thing is happening with the new battery.

My car has 50128 miles.
My car has an automatic transmission.

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